Shake the Stain Remover bottle for approximately 10 to 20 seconds. Open the bottle and pour a small amount of Stain Remover liquid directly onto the Scourer Pad while holding it flat. Apply the liquid to the glass surface, using circular motions with the Scourer Pad. Ensure that you cover the entire surface of the glass. Leave the Stain Remover on the glass surface for approximately 10 to 20 minutes to allow the active ingredients to work.