Spray On, Wait Until Mildew Stains Disappear, Rinse And Repeat If Necessary. Use On Bathroom Tile, Grout, Fiberglass Or Vinyl Showers, Vinyl Bathmats Or Shower Curtains, Vinyl Awnings, Vinyl Patio Furniture, Vinyl Auto And Boat Surfaces, Garbage Cans, Diaper Pails And On Mildewed Exteriors Of The House In Preparation For Painting.