I tried this product as a last ditch effort to remove pet stains and vomit stains that I have tried everything else on. I have shampooed several times, and they seemed to disappear, only to reappear days later. So when I tried this product, and after several hours, the stain was gone, I still waited for it to reappear, but it has been a week and the stains are no longer there. They are gone for good. I have already recommended this product to several of my friends and will have a bottle on hand in my house always. It's amazing