It works well on both old and new stains. It has to be the blue kind only, not any other scent or color windex. The only color carpet that you have to be carful with when using this is if your carpet is white!!! If your concerned with the amonia in it, I can tell you I have not had any repeat offenders. Its an old trick from my carpet cleaning job years ago. I used it to remove an old red kool-aid stain with help from an iron. If you want to know the iron secret feel free to pm me. |