Our cat had a relapse on peeing on the couch for the first time in 8 years and I was running low of the older product (urine off) that we had always used but was never 100% happy with lingering smells (completely replaced couch previously and continued using other product for kitty litter cleaning). Petlab popped up when I was searching for waterproof/absorbent blankets to protect the couch while we got on top of things so i decided to try the cleaner aswell as blanket. The cleaber has far exceeded our expectations! There is no lingering smell as described in testimonials and by its creators. There us hope that we don't have to replace the couch! Its super easy to use and we found the best results when used in conjunction with a water vaccume after following intial instructions. Have just subscribed for a 5L every 6 months to keep on hand.