I have 2 dogs and 2 cats, and I don't know who did it, but somebody peed on my carpet! I've tried everything to get the smell out: vaccuum, air freshner, baking soda, SHAMPOO! And I still smell it. It had to be that male cat...What makes it worse is that once they go in a certain spot, I know they'll try to go there again! Has anyone tried something that works?