Step 1: Clean the lenses before using anti-fog cloth to wipe in order to prevent scratches.
Step 2: Rub both side of the lenses for 5 -10 times.
Step 3: Your lenses are fog protected now!
*Each cloth can be used up to 1000 times.
*Please do not wash this cloth.
Measurement (cloth ): 15 cm x 15 cm