Wet fabric with water. Using a clean cloth or sponge, apply Boat Cover Cleaner to surface with light rubbing action. Heavily soiled fabrics may require rubbing with a stiff nylon type brush. Rinse with freshwater and wipe off with clean cloth to dry. Guard against spilling on surfaces not being treated. If contact with other surfaces does occur, rinse immediately. To waterproof cleaned fabric surface, we recommend an application of Star brite Waterproofing.