Smells & Stains uses a broad spectrum of natural enzymes and co-enzymes to break down the toughest stains and odors completely. Smells & Stains dissolves organic matter from pet accidents, blood, urine, and food and beverages quickly and easily. This natural, biodegradable formula will not harm or discolor most carpets or upholstery, or irritate sensitive skin. Smells & Stains is easy to use and requires no rinsing.