Ruby If vinegar smell doesn't bother you you could try cleaning it with that. It's supposed to break down the protein that makes urine stink so bad. I use it on my laminate flooring when I change puppy pads and Yumi has peed on the edge, but actually managed to pee under the pad instead of on it. It seems to work fairly well for us, and the vinegar smell fades. Not sure if it would be enough on a potty patch, but it's certainly worth a try
