Carpets and upholstery are magnets for embedded, foul odors and are the most difficult to treat. The Fresh Wave IAQ Carpet & Upholstery additive is the strongest solution on the market that can be easily added to a truck mount or a portable cleaning system to fully eliminate any odor deep within the fabric’s weave. Simply add Fresh Wave IAQ Carpet & Upholstery Additive to your carpet steam cleaners, and you will provide added-layer of odor elimination that is all natural and non-toxic. Use 2 oz. RTU Additive per gallon of water in extraction type cleaners or 4 oz. per gallon when using the bonnet method. More or less can be used depending on the intensity of the odor.