20 Best Enzyme Stain Remover [2024]

Are you looking for the best enzyme stain remover? Based on expert reviews, we ranked them. We've listed our top-ranked picks, including the top-selling enzyme stain remover.

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# Preview Product
1 Puracy Stain Remover for Clothes - Laundry Spray for Fresh and Set-In Clothing Stains - Enzyme-Based... Puracy Stain Remover for Clothes - Laundry Spray for Fresh and Set-In Clothing Stains -...
2 Rocco & Roxie Stain & Odor Eliminator for Strong Odor - Enzyme-Powered Pet Odor Eliminator for Home... Rocco & Roxie Stain & Odor Eliminator for Strong Odor - Enzyme-Powered Pet Odor Eliminator for...
3 Zout Laundry Stain Remover Spray, Triple Enzyme Formula, 22 Ounce Zout Laundry Stain Remover Spray, Triple Enzyme Formula, 22 Ounce
4 Zout Triple Enzyme Formula Laundry Stain Remover Foam, 22 Fl Oz (Pack of 1) Zout Triple Enzyme Formula Laundry Stain Remover Foam, 22 Fl Oz (Pack of 1)
5 Zout Triple Enzyme Formula Laundry Stain Remover, 12 Ounce Zout Triple Enzyme Formula Laundry Stain Remover, 12 Ounce
6 Biokleen Bac-Out Stain Remover for Clothes & Carpet - 128 Ounce - Enzyme, Destroys Stains & Odors... Biokleen Bac-Out Stain Remover for Clothes & Carpet - 128 Ounce - Enzyme, Destroys Stains & Odors...
7 Biokleen Bac-Out Stain Remover for Clothes & Carpet - 32 Ounce 2 Pack - Natural Enzymatic Foam... Biokleen Bac-Out Stain Remover for Clothes & Carpet - 32 Ounce 2 Pack - Natural Enzymatic Foam...
8 BUBBAS Super Strength Enzyme Cleaner - Pet Odor Eliminator - Carpet Stain Remover - Remove Dog & Cat... BUBBAS Super Strength Enzyme Cleaner - Pet Odor Eliminator - Carpet Stain Remover - Remove Dog &...
9 Simple Solution Cat Extreme Pet Stain and Odor Remover | Enzymatic Cleaner with 3X Pro-Bacteria... Simple Solution Cat Extreme Pet Stain and Odor Remover | Enzymatic Cleaner with 3X Pro-Bacteria...
10 Zout Triple Enzyme Formula Laundry Stain Remover Foam - 22 oz - 2 pk Zout Triple Enzyme Formula Laundry Stain Remover Foam - 22 oz - 2 pk
11 Simple Green Bio Dog Active Stain & Odor Remover - Enzyme Cleaner & Stain Remover for Carpet, Rugs &... Simple Green Bio Dog Active Stain & Odor Remover - Enzyme Cleaner & Stain Remover for Carpet, Rugs...
12 OUT! PetCare Advanced Stain and Odor Remover | Pro-Bacteria and Enzyme Formula for Tough Stains and... OUT! PetCare Advanced Stain and Odor Remover | Pro-Bacteria and Enzyme Formula for Tough Stains...
13 Good Life Solutions Natural Odor and Stain Remover Spray - Unscented Plant-Based Child and Pet Safe... Good Life Solutions Natural Odor and Stain Remover Spray - Unscented Plant-Based Child and Pet...
14 Probiotic Enzyme Cleaner - Professional Strength Solution -One Gallon- Natural Bio-Enzymatic Stain &... Probiotic Enzyme Cleaner - Professional Strength Solution -One Gallon- Natural Bio-Enzymatic Stain...
15 naturally It's clean Enzymatic Laundry Stain Remover Spray and Odor Eliminator | Fabric Safe Stain... naturally It's clean Enzymatic Laundry Stain Remover Spray and Odor Eliminator | Fabric Safe...
16 Angry Orange Odor Eliminator & Pet Stain Remover - Carpet Cleaner for Pets, Citrus Scented Dog Urine... Angry Orange Odor Eliminator & Pet Stain Remover - Carpet Cleaner for Pets, Citrus Scented Dog...
17 TriNova Natural Pet Stain and Odor Remover Eliminator - Advanced Enzyme Cleaner Spray - Remove Old &... TriNova Natural Pet Stain and Odor Remover Eliminator - Advanced Enzyme Cleaner Spray - Remove Old...
18 Professional Strength Stain & Odor Remover - Natural Enzyme Cleaner (Bulk 32oz) for Dog & Cat Urine,... Professional Strength Stain & Odor Remover - Natural Enzyme Cleaner (Bulk 32oz) for Dog & Cat...
19 Pet Stain & Odor Miracle - Enzyme Cleaner for Dog Urine Cat Pee Feces Vomit, Enzymatic Solution... Pet Stain & Odor Miracle - Enzyme Cleaner for Dog Urine Cat Pee Feces Vomit, Enzymatic Solution...
20 Carbona Laundry Stain Scrubber | Bio-Enzyme Stain Remover | Eliminates Fat, Oil, Blood, Milk, Fruit,... Carbona Laundry Stain Scrubber | Bio-Enzyme Stain Remover | Eliminates Fat, Oil, Blood, Milk,...
Bestseller No. 1
Puracy Stain Remover for Clothes - Laundry Spray for Fresh and Set-In Clothing Stains - Enzyme-Based...
  • For those who hate new clothes becoming play clothes after one use and sofa cushions with no more clean sides to turn to.
  • Perfect Laundry: Guaranteed to safely remove all clothing stains and odors. whether the stain was made 3 minutes ago or 3 years ago.
  • All Stain Sources: Eliminates grass, berries, blood, sweat, oil, red wine, cosmetics, dairy, avocado, turmeric, watermelon, pee, poop, vomit, grease,...
  • All Water-Safe Fabrics: Thoroughly cleans clothing, linens, bedding, carpets, mattresses, couches, floor mats, dress shirts, fitness gear, denim,...
  • Only Pure Ingredients: No sulfates (SLS, SLES, SCS), phosphates, bleach, peroxide, brighteners, salicylates, parabens, petroleum-based ingredients,...
Bestseller No. 2
Rocco & Roxie Stain & Odor Eliminator for Strong Odor - Enzyme-Powered Pet Odor Eliminator for Home...
  • CERTIFIED GENTLE AND SAFE Chlorine free and color safe. Safe to use around pets and children. No hazardous propellants, no residue left behind. So...
  • ELIMINATES STAINS, ODORS AND RESIDUE If it’s gross, it’s gone. Not just the stain, but the stink. From stinky yellow pet urine and feces to vomit...
  • EVERY SURFACE, EVERY TIME For use on carpets, floors, furniture, clothing, litter boxes, kennels, carriers, all pet living and sleeping...
  • ENZYME ACTIVATED The key is getting to the problem deep-down. This spray contains natural enzymes that are activated on contact with odors and stains,...
  • 100% SATISFACTION GUARANTEED An Amazon best seller—for a reason. If your stains and odors aren’t gone, neither is your money. We’ll refund it in...
Bestseller No. 3
Zout Laundry Stain Remover Spray, Triple Enzyme Formula, 22 Ounce
  • The first enzyme helps remove tough protein stains such as Blood, Grass, and Sweat
  • The second enzyme works on starch stains like Tomato and BBQ Sauces.
  • The third enzyme targets oily stains like Salad Dressing and Margarine.
  • Triple Threat Stains Need Triple Enzyme Formula.
  • This package includes on 22 Ounce bottle of Zout Laundry Stain Remover
Bestseller No. 4
Zout Triple Enzyme Formula Laundry Stain Remover Foam, 22 Fl Oz (Pack of 1)
  • The first enzyme helps remove tough protein stains such as blood, grass and sweat
  • The second enzyme works on starch stains like tomato & bbq sauces
  • The third enzyme targets oily stains like salad dressing, and margarine
Bestseller No. 5
Zout Triple Enzyme Formula Laundry Stain Remover, 12 Ounce
  • The first enzyme helps remove tough protein stains such as blood, grass and sweat
  • The second enzyme works on starch stains like tomato & bbq sauces
  • The third enzyme targets oily stains like salad dressing, and margarine
Bestseller No. 6
Biokleen Bac-Out Stain Remover for Clothes & Carpet - 128 Ounce - Enzyme, Destroys Stains & Odors...
  • STAIN AND ODOR REMOVER: Bac-Out safely works wonders on pet accidents, wine spills on carpets and couches, cloth diapers and pails, laundry,...
  • PREFERRED BY PROFFESSIONALS: Bac-Out is the preferred choice of commercial carpet cleaners nationwide.
  • BIO ACTIVE FORMULA: A unique blend of live enzyme cultures breakdown and absorb organic material. It's a more natural way to remove buildup and stinky...
  • PLANT BASED CLEANER: Bac-Out uses a plant-based, eco-friendly solution with no artificial fragrances or dyes. Our products never contain phosphates,...
  • NEVER TESTED ON ANIMALS AND MADE IN THE USA: Biokleen products are never tested on animals, use biodegradable ingredients and are proudly manufactured...
Bestseller No. 7
Biokleen Bac-Out Stain Remover for Clothes & Carpet - 32 Ounce 2 Pack - Natural Enzymatic Foam...
  • STAIN AND ODOR REMOVER: Bac-Out safely works wonders on pet accidents, wine spills on carpets and couches, cloth diapers and pails, laundry,...
  • FULL STRENGTH: Bac-Out's formula is ready to use. No diluting necessary. Our spray bottles are easy and ready to use!
  • BIO-ACTIVE FORMULA: A unique blend of live enzyme cultures breakdown and absorb organic material. It's a more natural way to remove buildup and stinky...
  • PLANT-BASED CLEANER: Bac-Out uses a plant-based, eco-friendly solution with no artificial fragrances or dyes. Our products never contain phosphates,...
  • NEVER TESTED ON ANIMALS AND MADE IN THE USA: Biokleen products are never tested on animals, use biodegradable ingredients and are proudly manufactured...
Bestseller No. 8
BUBBAS Super Strength Enzyme Cleaner - Pet Odor Eliminator - Carpet Stain Remover - Remove Dog & Cat...
  • ELIMINATES THE STUFF OF STAINS AND STINKS: The bio-enzymatic spray activates on contact with ammonia crystals and organic matter and doesnt stop...
  • GIVE IT PERMISSION TO GO ANYWHERE IN YOUR HOUSE: You can trust it on carpets, floors, furniture, clothing, litter boxes, kennels, carrier, anywhere...
  • WELL-BEHAVED AROUND PETS AND KIDS: With no chlorine, no chemical propellants, and nothing that stains or fades colors, its your houses best friend....
  • 100% SATISFACTION GUARANTEED: If your worst stains and odors arent gone, neither is your money. Well give you a full refund, no questions asked.
Bestseller No. 9
Simple Solution Cat Extreme Pet Stain and Odor Remover | Enzymatic Cleaner with 3X Pro-Bacteria...
  • DESIGNED FOR THE TOUGHEST ODORS AND ORGANIC STAINS- Simple Solution pet Extreme Stain and Odor remover is three times stonger than our regular formula...
  • PROFESSIONAL STRENGTH FORMULA - Extreme Stain and Odor Remover is a professional strength Pro-Bacteria and enzyme formula that breaks down and...
  • SPECIFICALLY FOR PET ODORS AND ORGANIC STAINS - Safely and quickly removes dog and cat urine, feces, and vomit on carpet, upholstery, bedding, fabric...
  • NEW PATENTED MULTI-FUNCTIONAL SPRAYER - Now designed with a new patented 3-in-1 nozle sprayer (foam, mist, and stream).
Bestseller No. 10
Zout Triple Enzyme Formula Laundry Stain Remover Foam - 22 oz - 2 pk
  • Safe on washables
  • Amylase for starch stain like BBQ sauce, chocolate syrup, tomato sauce, and baby food
  • Protease
  • Zout Formula is safe on a washables.
  • Triple Enzyme Formula Laundry Stain Remover
Bestseller No. 11
Simple Green Bio Dog Active Stain & Odor Remover - Enzyme Cleaner & Stain Remover for Carpet, Rugs &...
  • Permanently eliminates tough stains and unpleasant odors from urine, feces, vomit, scent markings, dirt, blood and more
  • Use on porous surfaces such as carpet, rugs, pet bedding, fabric, upholstery, clothing, curtains, Auto upholstery, crates, tile, finished wood,...
  • Uses powerful, natural enzymes to eliminate odors at the source rather than cover them up
  • Safe for use around pets
  • Eliminates new, old and set-in stains
Bestseller No. 12
OUT! PetCare Advanced Stain and Odor Remover | Pro-Bacteria and Enzyme Formula for Tough Stains and...
  • TACKLE TOUGH STAINS: 3x Pro-Bacteria and Enzyme formula cleans deep to remove the severe stains in your home.
  • PATENTED 3-IN-1 SPRAYER: This multifunctioning sprayer allows you to tackle any kind of stain that comes your way, and elimintae it the first time.
  • ELIMINATE EVERYDAY MESSES: Formula fights more than just pet stains, and is effective in cleaning and eliminating your everyday spills around the...
  • CERTIFIED CLEANER: Certified by the Carpet and Rug Institute, you can clean your carpets, bedding and most water-safe surfaces with confidence.
  • REMOVE UNWANTED ODORS: The Enzyme formula destroys the odor-causing bacteria to eliminate those unwanted smells.
Bestseller No. 13
Good Life Solutions Natural Odor and Stain Remover Spray - Unscented Plant-Based Child and Pet Safe...
  • POWERFUL NATURAL SPRAY CLEANER FOR LIFE'S MESSES. Our plant-based stain remover spray is tough on stains like poo, pee, vomit, and blood. The powerful...
  • EARTH-FRIENDLY ENZYME SPRAYS YOU CAN TRUST. You'll get 32 fl. oz. of a powerful laundry stain and pet urine remover that is completely made in the...
  • ERASE THE STAINS FOR GOOD. Does that stain remind you of an experience you’d like to forget? Clean up tough stains from potty training messes to...
  • USE ON ALL WATER-SAFE FABRICS AND SURFACES. You can use this home and pet cleaner spray as a car seat stain remover, on your mattress, upholstery or...
  • YOUR HAPPINESS IS OUR HAPPINESS! We created this all natural stain remover to be tough on stains - and kind to Mother Earth - and safe for your kids,...
Bestseller No. 14
Probiotic Enzyme Cleaner - Professional Strength Solution -One Gallon- Natural Bio-Enzymatic Stain &...
  • ENZYME ACTIVATED: Our enzymatic formula contains natural live cultures that seek & destroy organic waste as a food source. Releasing powerful enzymes...
  • THE SCIENCE: Enzymes work to break down complex waste particles into smaller pieces that can be more easily consumed. These smaller...
  • READY TO USE & NO RESIDUE: Commercial-grade, maximum strength formula provides fast-acting, sustained stain & odor elimination that’s RELIABLE &...
  • MULTI-SURFACE: Formulated for efficiency & versatility, Bastion’s Probiotic Stain & Odor Remover can be used on hard surfaces, floors, carpets,...
  • FAMILY SAFE & ENVIRONMENTALLY FRIENDLY: Bastion Probiotic Stain & Odor Remover contains neither bleach nor chlorine. This product is non-toxic and...
Bestseller No. 15
naturally It's clean Enzymatic Laundry Stain Remover Spray and Odor Eliminator | Fabric Safe Stain...
  • POWERFUL LAUNDRY STAIN REMOVER & CLEANER | This laundry stain cleaner finds is strength naturally from plant enzymes. These plant-based enzymes are so...
  • NO STAIN IS TOUGH ENOUGH. NO ODOR IS STRONG ENOUGH | Our smart enzymatic cleaner for clothes removes red wine stains out of your clothing easily,...
  • THE BEST ALL AROUND NON GMO PLANT BASED ENZYME STAIN REMOVER | This odor and laundry spot cleaner is naturally powered by plant based enzymes to...
  • EASY TO USE AND WILL NOT DAMAGE YOUR CLOTHING | It contains biodegradable advanced enzyme formulation designed to ONLY target stains while keeping any...
  • THE ENZYME SOLUTIONS GUARANTEE | As one of the foremost experts in advanced natural enzyme technology applications, our environmentally friendly...
SaleBestseller No. 16
Angry Orange Odor Eliminator & Pet Stain Remover - Carpet Cleaner for Pets, Citrus Scented Dog Urine...
  • DUAL ACTION - Our stain remover and pet odor eliminator for home will help you enjoy having your furry friends around without the messes! Our...
  • DESTROY STAINS AND SMELLS - This extremely effective dog urine odor eliminator spray doesn't just mask foul odors and stains, it destroys them upon...
  • MULTI-SURFACE USE - A versatile odor eliminator and carpet stain remover that can clean it all! This multi-surface enzyme cleaner for dog urine works...
  • CITRUS SCENT - Made from citrus enzymes and other natural ingredients, this pet stain and odor remover leaves a fruity fragrance behind with every...
  • CUSTOMER SATISFACTION - Add this enzymatic cleaner to the top of your list of pet supplies for dogs and puppies. If you have any questions or concerns...
Bestseller No. 17
TriNova Natural Pet Stain and Odor Remover Eliminator - Advanced Enzyme Cleaner Spray - Remove Old &...
  • ✅ 100% NATURAL CLEANER - We are setting the "Green Standard' by using only natural and organic ingredients in our formula and listing everything...
  • ✅ PROFESSIONAL STRENGTH - TriNova's Pet Stain & Odor Remover features a blend of natural enzymes that tackle stains and odors at their root to clean...
  • ✅ SAFE Around Kids & Pets - TriNova understands your pets frequent the spaces where you and your children spend the most time as well. Because of...
  • ✅ USE IT ANYWHERE - Use this natural pet stain remover on most surfaces such as bedding, mattress, cage, kennel, laundry, clothes, hardwood, litter...
  • ✅ 100% SATISFACTION GUARANTEE - We think you'll love our product, but if you don't just let us know and we'll refund your purchase price!
Bestseller No. 18
Professional Strength Stain & Odor Remover - Natural Enzyme Cleaner (Bulk 32oz) for Dog & Cat Urine,...
  • Professional Strength - This odor eliminator cleaner flat out works! Use it on carpet, upholstery, hardwood, tile, and more to remove stains and...
  • Natural, Non-Toxic, & Biodegradable - Because this product is plant-based, it is entirely safe around both kids and pets. Plant-based Enzymes not only...
  • Made in the USA with Safe Ingredients - This product is sourced and made in the United States. Other brands often buy overseas leading to a less...
  • Natural Citrus Scent - Entirely plant based and made from real ingredients, this pet stain and odor remover is not only effective, but also smells...
  • Support a Small Business - Pawstruck is owned and operated right here in the USA. We’re a company made up of likeminded dog-lovers who passionately...
SaleBestseller No. 19
Pet Stain & Odor Miracle - Enzyme Cleaner for Dog Urine Cat Pee Feces Vomit, Enzymatic Solution...
  • ❤️ EASY CLEANUP - Pet Stain & Odor Miracle makes clean up fast and easy, so you can quickly return to having fun with your fur-baby. Only an...
  • 😊 INCREDIBLE VALUE - Pet Stain & Odor Miracle makes it very easy for you to clean every surface in your home - carpet, rug, hardwood, laminate,...
  • ⭐ HIGHEST QUALITY - All of Sunny & Honey’s products are made with the highest quality ingredients available, right here - in the beautiful USA. As...
  • 🌱 NATURAL CLEANING POWER - Pet Stain & Odor Miracle was created with your furry kids in mind! This bio-enzymatic formula is biodegradable,...
  • ✔ OUR PROMISE - If you are not 100% in LOVE with Pet Stain & Odor Miracle, send it back for a full refund. You have absolutely nothing to lose...
Bestseller No. 20
Carbona Laundry Stain Scrubber | Bio-Enzyme Stain Remover | Eliminates Fat, Oil, Blood, Milk, Fruit,...
  • ALL-IN-ONE STAIN REMOVER: Ready to say goodbye to those stubborn stains for good? Our Laundry Stain Scrubber extra-strength formula with natural...
  • WIDE RANGE STAIN FIGHTING POWER: Now you can remove most grease, protein-based and strongly colored stains caused by fat, oil, blood, milk, fruit,...
  • SAFE & EFFECTIVE: Dermatologically tested to be safe for your hands and environmentally friendly for disposal. Carbona Stain Scrubber is safe and...
  • SIMPLE DIRECTIONS: Test for color fastness in an inconspicuous area. Apply Carbona Laundry Stain Scrubber to the stain. Work into the fabric with the...
  • THE CARBONA WAY: When it comes to cleaning, we know our stuff. Cleaning-related catastrophes? Please. Stains that haunt you forever? Yeah, right....

Having trouble finding a great enzyme stain remover?

This problem is well understood by us because we have gone through the entire enzyme stain remover research process ourselves, which is why we have put together a comprehensive list of the best enzyme stain removers available in the market today.

After hours of searching and using all the models on the market, we have found the best enzyme stain remover for 2023. See our ranking below!

How Do You Buy The Best Enzyme Stain Remover?

Do you get stressed out thinking about shopping for a great enzyme stain remover? Do doubts keep creeping into your mind?

We understand, because we’ve already gone through the whole process of researching enzyme stain remover, which is why we have assembled a comprehensive list of the greatest enzyme stain remover available in the current market. We’ve also come up with a list of questions that you probably have yourself.

John Harvards has done the best we can with our thoughts and recommendations, but it’s still crucial that you do thorough research on your own for enzyme stain remover that you consider buying. Your questions might include the following:

  • Is it worth buying an enzyme stain remover?
  • What benefits are there with buying an enzyme stain remover?
  • What factors deserve consideration when shopping for an effective enzyme stain remover?
  • Why is it crucial to invest in any enzyme stain remover, much less the best one?
  • Which enzyme stain remover are good in the current market?
  • Where can you find information like this about enzyme stain remover?

We’re convinced that you likely have far more questions than just these regarding enzyme stain remover, and the only real way to satisfy your need for knowledge is to get information from as many reputable online sources as you possibly can.

Potential sources can include buying guides for enzyme stain remover, rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible enzyme stain remover. Make sure that you are only using trustworthy and credible websites and sources.

John Harvards provides an enzyme stain remover buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information.

How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available enzyme stain remover currently available on the market.

This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:

  1. Brand Value: Every brand of enzyme stain remover has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
  2. Features: What bells and whistles matter for an enzyme stain remover?
  3. Specifications: How powerful they are can be measured.
  4. Product Value: This simply is how much bang for the buck you get from your enzyme stain remover.
  5. Customer Ratings: Number ratings grade enzyme stain remover objectively.
  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their enzyme stain remover.
  7. Product Quality: You don’t always get what you pay for with an enzyme stain remover, sometimes less, and sometimes more.
  8. Product Reliability: How sturdy and durable an enzyme stain remover is should be an indication of how long it will work out for you.

John Harvards always remembers that maintaining enzyme stain remover information to stay current is a top priority, which is why we are constantly updating our websites. Learn more about us using online sources.

If you think that anything we present here regarding enzyme stain remover is irrelevant, incorrect, misleading, or erroneous, then please let us know promptly!

Related Post:

FAQ:

Q: What cleaning products contain enzymes?

A: A type of protein, enzymes are produced by living organisms, but they are not alive. An enzyme is made up of a chain of amino acids, and it’s the changes to the sequence in the structure that dictates the function of the enzyme. The two most common enzymes used in cleaning products are proteases and amylases,…

Q: What are some brands of Enzyme cleaning products?

A: Rug Doctor brand cleaners and Pawsitively Clean, a brand owned by Bissell , are examples of steam cleaners that use enzymes. The Naturally It’s Clean brand sells a large line of enzyme-based cleaning products, including laundry detergents and carpet cleaners as well as glass, floor, bathroom, kitchen and mildew cleaners.

Q: What are examples of Enzyme cleaners?

A: Carpet and rug steam cleaners typically use enzyme-based products to remove pet stains and urine and feces odors. Rug Doctor brand cleaners and Pawsitively Clean, a brand owned by Bissell , are examples of steam cleaners that use enzymes.

Q: What is cleaner with enzymes?

A: An enzymatic cleaner is a non-toxic, biodegradable cleaning agent. An enzyme is a substance that has been produced by a living organism so most enzyme cleaners are made using citrus or other types of fruit. These effective cleaners use enzymes to speed up the chemical reactions that remove stains.