These other sprays work well on one surface, but do not work well on other surfaces. Moreover, when your lens has a specific coating, it is difficult to find an effective solution.Experience the immediate removal of results! Many other sprays require long wait times.Some even take 20 minutes to wipe off. Our sprays provide instant anti-fog protection. Just apply a small amount of anti-fogging agent on the lens, then rub evenly on the lens area with your fingers, and then rinse thoroughly for a few seconds.Defogging agent: spraying, rubbing and washing are safe and effective for many different surface types and coatings, effective for various lenses and glasses, immediately defogging, non-toxic, natural and hypoallergenic, long lasting, no streaks,Size: 30ml,60ml,120mlProduct package:1*Car antifogging agent