This quality spray did exactly as advertised. I have a cat, who likes to go outside his litter box, and an active toddler who loves to drop food and color on our light-colored carpet.  I used this Bissell Pet Stain and Odor spray as directed, generously spraying a stained area, blotting and covering with a wet rag, and leaving it alone for several hours.  I am pleased to say that even some long-time stains that I grown to live with are starting to fade considerably or disappear entirely.