My 3 dogs were marking on this chair for a year. It was in a room we never went into. I was about to throw it out after steam cleaning 3 times. Saw this ad and was like, better give it one more shot. I can’t believe that it all came out. I can put my nose to it and it is clean. I am not going to lie. It took 12 applications over 14 days. Every use you could see it getting lighter. I almost gave up but I reupholstered it myself and it was the biggest pain to do, so I just couldn’t give up. Simply amazed! I also found a few other spots I didn’t know about. All the smell is gone! Just wow! Worth every penny and I just ordered more.