Apply to surface with trigger sprayer to thoroughly wet surface. Allow to remain wet for several minutes, then rinse. For heavily soiled areas, a precleaning with this product may be required. Rinse immediately after use on rubber, plastic and vinyl. Avoid prolonged contact with metal and old porcelain as this product can react with these materials and leave a “rusty” stain. Do not use on wood or painted surfaces. This product may not be able to remove mildew embedded in hard water deposits, old grout or silicone caulking. Avoid contact with aluminum, clothes, fabric, carpet or paper surfaces as they will discolor. AVOID PROLONGED BREATHING OF VAPOR. Use in well-ventilated areas. Open windows and turn on fans before use. If the vapors bother you, leave the room while this product is working.