It really works! I had tried everything after potty training my dachshund and the stains kept resurfacing. I bought My Pet Peed - Pet Urine Remover to try and treat old stains that had set in my carpet. I didn’t have much hope that it would work, but I followed the directions and the next day the stains are just gone. I can’t believe it. I didn’t have to scrub or anything. They are just gone. It seems too good to be true. BUY THIS PRODUCT!