So ever since my son was born our cat has been really good about not messing with the baby or his stuff. Well we recently got him a playpen and the cat has decided that's his new litter box all he does is pee in it but how can I clean it effectively. I'm going to start keeping a fitted sheet over it so the cat cant get into it but i need to clean it first. Any ideas on what I can use that way my baby can safely use it again??