In those expensive cat pee removers, the word 'enzyme' appears often. I noticed it also appears in the laundry additive called 'Biz', so I tried it in a very stinky laundry load of pee contaminated towels. It worked perfectly. I tried it in a soak ( 1 gallon water, 1 tablespoon Biz) and it also worked great. That solution is good to pour onto furniture, carpets, mattresses too. It can be worked in, allowed to dry, and you're good to go. It would also be a good way to clean dog pee.