Well, it's really not THAT bad putting something like that in your washing machine...I ALWAYS wash dog beds or crate pads or toys in HOT water and that kills any bacteria anyways. I always clean the poop off whatever it is FIRST, of course...lol...and the pee is really not all that bad...it just rinses right out. I have NEVER had any load of clothes that came out AFTER a load of dog pads and beds smell like pee...NEVER. And I have OCD...
