mechanical- this method is especially useful when customary wet upholstery cleaning might result in dye bleeding cellulosic browning or the like. it involves first spraying or misting the fabric with odorless mineral spirits followed by hot water extraction cleaning using a hot detergent solution and thorough extraction. finally a light application of OMS or volatile dry solvent may again be used. the fabric is rapidly dried using the equipments extraction system assisted by fans or air movers/blowers. small sections are cleaned one at a time to ensure rapid drying.