Cat urine has a terrible smell that can greatly reduce the value of your carpeting if it's not properly cleaned. The trouble with some cat urine stains--particularly stains on darker colored carpet--is that it can be hard to find. If you're a cat owner, there may be several places in your carpeting that your cat has soiled but which you cannot find. These tips will help you clean and deodorize the stains in your carpeting.
What should you do if you know the cat peed in the carpet but you can't find the stain?
Old cat urine can be made visible under light from a black light with a wavelength of 365 to 385 nanometers. To see the cat urine, wait until after dark. Close the door and shut the blinds. When the room is completely black, turn on the black light and slowly scan the room. The cat urine will appear under the black light as a bright blotch in the carpet.
How can you clean an old cat urine stain once it's dried?
It's always best to catch cat urine when it's wet, but you can still clean cat urine out of the carpet once it's dry. To do this, flush the spot with cold water, then blot the area with a rag until it's still wet but no longer soaked. Next, mix equal parts vinegar and warm water together in a bucket. Pour some of the warm water and vinegar onto the urine stain and allow the vinegar to sit on the spot for a few hours. Blot the area with a dry rag, then let the spot dry overnight. The following day, sprinkle baking soda over the area and allow the baking soda to sit on the spot overnight.
As a final step, mix a small container of dish soap and hydrogen peroxide. Soak a rag with the mixture, then wipe the baking soda covered carpet with the rag. Allow the carpet to dry one more time, then vacuum the spot.
Going through this procedure should ensure that the urine and its smell is truly gone. You'll be able to tell for sure by waiting until dark, turning out the lights and using the black light to illuminate the area where the cat peed. If the stain is truly gone, it won't appear under the black light anymore. For more information about carpet cleaning and the procedures for removing cat urine, talk to a carpet cleaning professional.