Well, we came in and performed the clean today on the post Rug Doctor carpets. I really had high hopes of making this carpet really pop but it kicked out butts. It certainly looks a lot better and the customer is happy but I'm not happy. I'm thinking it might be time to get some samples from you Robert Allen and try them myself. I've seen worse carpets come out better. We used Grand Slam prespray boosted with citrus and after that didn't work I added some (lot) Grout Devil. It made a big difference but there's still dark spots everywhere. Polyester carpets don't usually give me this much trouble. Even the red stains were impossible to move. Used Red 1w/iron, rust remover and oxidizer. Nothing would get this red out. The pad under sections of this carpet is just gone, it's old carpet but I still expected better.