Can you use hydrogen peroxide to clean cat pee

By Tom Farrington MRCVS., MVB., VetMFHom

Cats are generally very clean creatures. They learn to use a litterbox quickly and usually confine their toilet behaviour to the litter tray or garden. As a result, the smell of cat urine in the house can be worrying and needs to be investigated.  Once you have got to the bottom (excuse the pun) of the causes of your cat’s urinary incontinenceand taken steps to treat it, you can focus on the job of cleaning up. Unfortunately, as most cat owners will attest to, cat urine is rather smelly, so getting rid of the smell of cat urine can be both a challenge and a priority! I have personally found the process detailed below to work very well, but do remember when using Vinegar that it can set a stain! Always test a patch area first for colorfastness etc., but in my experience, most people just want to be rid of the smell one way or another and during my use, I have been lucky enough not to find this a problem. Where your cat has recently urinated on the carpet, soak as much as possible up with paper towels or an old towel kept used for such purpose. Place them over the urine-soaked area and tread on till you have gotten out as much urine as possible. Repeat this until you have removed every last bit you can.   For urine that has dried, there are two ways to find the offending area, the most obvious being your nose, but for those with no sense of smell, there is a visual option. The stains from cat urine fluoresce under ultraviolet light in a darkened room and this can be found using a handheld portable UV Black Light, which can usually be picked up fairly cheaply. After removing as much urine as possible, you make a 1 part to 1 part (50%/50%) solution of white vinegar and water and wet the area right down to the bottom of the affected carpet fibers. After treatment, dry the area off as much as you can with paper towel or an old towel as previously described.  You can, of course, use a wet/dry vacuum cleaner for this purpose too. All that having been completed, you are onto the last stage, bar the final dry off:

  • Apply a handful of baking soda over the affected area
  • Mix a quarter of a cup of 3% Hydrogen Peroxide with a teaspoon of liquid hand dishwashing detergent
  • NB note: do not use Hydrogen Peroxide stronger than 3% (also known as V10 or 10 volume) because it will release 10 times its volume in oxygen. For the liquid hand dishwashing detergent one of the organic ones based in coconut oil is ideal. It is important not to use the caustic detergent you put into the machine dishwasher!
  • Drizzle this solution over the baking soda.  I prefer the easy life and mix both detergent and the hydrogen peroxide in a hand sprayer (making sure the cap is not on too tightly while mixing as there can be some expansion). Then I tighten the sprayer on once mixed and spray the area, working it well in with a scrubbing brush or similar tool.  
  • Allow to dry fully.  
  • Then once dry vacuum/hoover the area thoroughly. You can speed the process with a hairdryer or similar gentle heat source.   

And hey presto, your carpet or furniture should be back to normal!

Can you use hydrogen peroxide to clean cat pee
The cat population in America is about 94 million, and anyone who has a cat at home that stains and odors from cat urine can be a problem. Cat urine that seeps through the carpet into the padding and down to the floor beneath can give your home an unpleasant aroma and bad look. In almost all cases, it is the worst perpetrator of pet stains and pet odors.

When cats urinate as a means of elimination, they normally do it on a horizontal or flat surface like the ground or in a litterbox. When cats spray to mark their territory, they turn their backsides to the object, twitch their tails and spray urine on the vertical surface. But in both cases, cat urine could come in contact with a carpet.

The cat’s urine is an amber-colored liquid waste fluid excreted by the kidneys and is composed of waste products of protein metabolism. The color of urine and its staining potential will often depend on the cat's dietary habits, age, and sex, whether he is on medication or the cat's health. It can saturate absorbent materials such as padding, upholstery, and mattresses.

The older cats have diminished renal function, thus producing urine that contains more plasma proteins. Because less uric acephalia is secreted in this urine, it is less likely to stain a carpet, but it will produce an even stronger odor.

Typically, because cat diets are richer in protein than dog diets, their urine will produce harsher odors and are more likely to cause stains.

Urine can saturate absorbent materials such as carpet and padding, upholstery and mattresses well beyond the surface area to be cleaned effectively. It is very difficult to remove all of the urine from inside of these materials. Even after a thorough cleaning, stains, and odors often remain. So here are a few things you can do to eliminate the odor.

How to clean cat urine from carpet

Can you use hydrogen peroxide to clean cat pee
Removing it from your carpet can be one of the most difficult cleaning tasks since it produces an especially persistent, unpleasant odor and amber-colored stains, so here are a few things you can do to eliminate them when the “accident” has happened.

First, blot up as much of the urine as possible with a soft, clean white cloth or absorbent paper towel. Press down firmly (do not rub) for 30 seconds. The more fresh urine you can remove before it dries, the simpler it will remove the odor. Remove the towel and repeat the process until the area is fully dried. Rinse the "accident zone" thoroughly with clean, cool water. After rinsing, remove as much of the water as possible by blotting it up. Next, you have some options:

1. One of the newest technologies for cleaning cat urine is to penetrate the soiled area and deactivate the odor with peroxide. Spray a product that consists of 3% hydrogen peroxide and wait about five minutes. After that, use a clean white absorbent cloth, blot the area, pressing down firmly (do not rub) for 30 seconds. Repeat this blotting process until the area is dry. If the stain or odor persists, repeat the process.

Matt Humphries (science educator at a museum), who has read this article, gave us some suggestions for removing cat urine based on science: "I read your suggestions and hydrogen peroxide should be number 1. One of my cats was born with almost no large intestine, so he goes to the bathroom anywhere. Hydrogen peroxide, H2O2,  will damage proteins, lipids, etc. ( why it should NOT be used got first aid). Mixed with very little dish soap, it's the best around. Apply liberally. Soak the area, and you can leave it. No more stain or smell. A 3% solution is available from the grocery store. Under a dollar/liter. Do not water it down. 6%, you can buy at a beauty supply store, and if you really want to save money, you may buy 35% from an alternative health store. It is sold as food grade. BE CAREFUL, it is hazardous. Research how to handle properly. Avoid contact and any open flame. Must water it down. Do not allow contact with anything, god forbid skin, eyes, mucus membranes, ingestion, etc. This goes for pets too. If you so much as touch it, your skin feels like it's burning. When used, it breaks down into water and oxygen, which is why it's very volatile but useful. It's the cheapest and most efficient, effective way to remove stains and smells. The key is removal, not just covering up."

2. Baking soda works well to eliminate surface (but not deeply penetrated) odors. Dampen the area with clean water and then sprinkle baking soda over it. Rub the baking soda into the soiled area and let dry. Brush or vacuum to remove the dry material.

3. Another option is white vinegar. Mix 1-quart warm water and 1/2 cup white vinegar, and dribble the mixture onto the stain. Place dry towels over the stained area and put something heavy over the towels to increase the pressure. After some hours, remove the towels and raise the nap of the carpet with a soft-bristled hairbrush. Note: Test the vinegar solution on a piece of fabric hidden from view - under the cushion or on the furniture's backside.

4. To clean old or heavy stains in carpets, consider renting an extractor or wet-vac from a local hardware store. The extracting/wet-vac machines work like a vacuum cleaner and do the best job of forcing clean water through your carpet and then forcing the dirty water back out again. When you use these machines, you should follow the instructions carefully.

Note: Don’t use any chemicals with these machines – they work much more effectively with plain water.

5. Another way for cleaning the cat urine from carpets was submitted from one of our visitors - Elaine Byrnes. She says that if you add several drops of Listerine mouthwash to the water/peroxide mixture, it helps a lot with the odor. In addition to a great cleaning solution, this is a safe pest spray for plants around children or pets.

Once the soiled area is really clean, you should use a high-quality pet odor neutralizer available at pet supply stores. Test the affected surface for staining first, and read and follow the instructions.

If the area still looks stained after it’s completely dry from extracting and neutralizing, apply a specialized stain and odor removing bacteria/enzyme cleaner, such as "Outright Pet Stain Eliminator," "Pet 'Oops' Remover," or "Stain Gobbler".

How to clean cat urine from your upholstery

Can you use hydrogen peroxide to clean cat pee
When it is not possible to remove the cover of your couch or chair upholstery, observe the following cleaning procedures to get the cat urine out:

Dab stubborn stains with a soft, clean white cloth or absorbent paper towel. If solvents are required, avoid applying them directly onto the stain, and pour it onto a clean cloth. Clean the stain using a circular motion working from the outside inwards. After removing the stain, dry immediately with a handheld hairdryer using a cool setting. Take care to direct the air stream first towards the outside of the area, working inwards. Always be careful to rub any stains gently and to use a brush with soft bristles.

How to clean cat urine from hardwood floors

Cat urine can harm your hardwood floor and can cause rotting. However, you might not be ready to replace your floor just yet, so here are a few things you can do to eliminate the odor. If you can catch the problem while it's still "fresh," you'll be better off.

Remove any excrement and blot the entire wet area immediately and firmly with paper towels. Wash affected area several times with white vinegar. Rinse stain thoroughly with warm water. Blot dry with paper towels. Apply a specialized stain and odor-removing bacteria or enzyme cleaner.

Tip: Read the instructions carefully before using these products and test them in an invisible area. If you can not remove some old stains, try sanding away the stain and resealing the wood.

You must be extra vigilant about cat odor and attack the problems as soon as it occurs. You should also remove all the odor's traces because if the scent remains, the cat will do it again in the same spot.

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What cleaner neutralizes cat urine?

Baking Soda and Vinegar Vinegar, while a bit smelly itself, works to remove the lasting odor of sprayed cat urine because vinegar is an acid that neutralizes the alkaline salts that form in dried urine stains. A solution of one part water and one part vinegar can be used to clean walls and floors.

Does hydrogen peroxide take away pee smell?

Hydrogen Peroxide Based Products Products containing hydrogen peroxide can be effective on urine odors and stains. The hydrogen peroxide helps destroy the odor causing bacteria and can also help safely bleach out discolorations on hard and soft surfaces.

How does baking soda and peroxide clean cat urine?

Apply a handful of baking soda over the affected area. Mix a quarter of a cup of 3% Hydrogen Peroxide with a teaspoon of liquid hand dishwashing detergent. NB note: do not use Hydrogen Peroxide stronger than 3% (also known as V10 or 10 volume) because it will release 10 times its volume in oxygen.

What can I soak my cat pee in?

Mix one cup white vinegar with one cup water (1:1). Coat the urine-stained item with this solution and allow it to sit for a few minutes. Cover the stained area with baking soda, if you wish. Baking soda will work along with vinegar to absorb and neutralize odor.