Rain-X Anti-Fog is designed to eliminate interior condensation caused by wet weather, high humidity levels or temperature changes. The formula prevents misting up of internal windows and mirrors, and even works well under high humidity conditions. This makes it ideal to reduce condensation forming on interior automotive glass, such as windows and mirrors, especially on those cold, damp days. It is also suitable for use on bathroom mirrors to eliminate steaming! Rain-X Anti-Fog is easy to apply, just ensure the surface is fully clean before application. Only a small amount is required for the formula to be effective. Apply Rain-X Anti-Fog to a paper towel or dry cotton cloth and wipe across the glass surface. Allow to dry, and re-apply for a first time application. Once dry, buff off any excess until surface is clear – if any haze appears due to excess application, sprinkle with water and wipe over with a dry cloth or paper towel until clear. Please note: Do n.