I have used George for several years. When we bought our new home, it's carpet had some stain issues. When he leaves those stains and the dirt disappear. We have an older dog and grandchildren that make George work hard each time he comes over, but again, all the stains go away. He keeps trying new products on the recurring stains, but I have never found any carpet expert that can make certain stains go away and stay away. I love walking barefoot on the clean carpet and will have him back in 6-8 months.