Our carpet shampoo is specifically designed to eliminate, not mask, odors in your carpet. Period! Because the formula is 100% odorless, it returns your carpet back to being odorless. You smell nothing! 1) Vacuum carpet that is to be extracted. 2) Remove tank and determine capacity on the extractor (home carpet machine).Mix 2 oz. of OHdorless formula to 1 gallon of water in the extractor tank. Shake well and you are ready for extracting. The 4 oz. bottle makes up to 2 gallons of carpet shampoo that willtreat an above averaged sized bedroom, a living room or multiple hallways. For spot treatment, mix 1 oz. of formula to 3 oz. of water in a spray bottle. Treat stain / spot liberally, saturating it. Let stand for 25 minutes before extracting. The all natural formula is Eco friendly and because it does not contain a scent, it holds no oil. This gives you the assurance knowing that no toxic chemicals are being displaced into your carpets, around you, your pets, your plants or the people you care about. Shelf life is 2 years from date of purchase. Store out of the sunlight.