Zeiss anti-fog spray is applied directly to the lens and then dried with the supplied wipe. It keeps lenses from fogging up for up to 72 hours without affecting optical quality. The spray leaves a thin hydrophobic film, similar to a temporary additional coating. This ensures that small condensed water droplets do not adhere to the lens surface. It can be used on the lenses of all eyeglasses and camera lenses.
Checked. It works.
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