The best ways to remove the smell of cat urine depends on the area soiled with cat urine, but if there is cat urine on machine washable fabrics, add a 1-lb. box of baking soda with normal laundry detergent. With machine washable fabrics, it is important to air dry these items after they are thoroughly washed.
If a cat recently urinated on upholstery and carpet, use newspaper or paper towel to soak up as much urine as possible. It is crucial to remove as much fresh urine as possible before it dries to completely remove the odor. To get the urine soaked deep within carpeting, standing on a wad of paper towels onto the wet spot for one minute works well. Once the area is completely dry, use a pet odor neutralizer to get rid of the smell.
For urine spots that have soaked down to the padding under the carpet, the only way to completely get rid of the smell is to replace that area of the carpeting. It is important to avoid using steam cleaners to remove the urine from the carpeting because steam cleaners will cause the stain to become permanent and leave traces of the odor behind. Cleaning chemicals are also not effective at removing cat urine odors because they only mask the smell rather than completely eliminating them.