This is amazing! I used it to detail a car that I turned over and the interior was dirty. Door panels, seats, carpet. All had markings or stains. Works as advertised and will not cause fabric discoloration. I've used this to remove stains from carpets and seats including melted chalk! Spray on, leave on and in some cases just wipe off with a towel. For more stubborn stains I used a brush attachment. You couldn't even tell the stains were there. The person who bought the car even commented on how the interior looks new. The car has done over 100,000 miles and the interior has not been maintained. When I run out I will definitely buy more. I know it's a small thing, but the bottle was also filled to the brim with cleaner when I got it, most companies don't do that. You're sure to get your money's worth, and it doesn't take much to make this air purifier work. It's funny that he asks for a star rating on a fragrance. Most smaller items have a pleasant scent, as Meguiar's items usually have a fruity scent. Not that it had a bad or heavy smell. It just smells like detergent. .