How and when should I clean the lens?

• Clean the lens whenever you notice dirt or dust on the surface.
  • To remove dirt or smears on the lens, use a commercially available cloth for cleaning eyeglasses. If necessary, moisten a soft, lint-free cloth with lens cleaner and gently wipe the lens surface.
  Caution: Do not use glass cleaner to clean the lens or rub the lens with abrasive materials.