Don't miss the details of your dive. Learn how to keep your mask clear.
Heat from your face and air exhaled through your nose warm the air inside your mask. Moisture condenses on the glass, causing it to fog.
To prevent fogging:
1. Prepare a new mask. New mask lenses have a factory residue that needs removing. Two methods are rubbing the inside of the glass with abrasive toothpaste or passing a lighter flame over the inside. Caution: the flame method is only for glass lenses; avoid burning other parts and wash the glass once it has cooled.
2. Exhale only a little air through your nose—just enough to equalize the mask.
3. Use an anti-fog product. Before wetting your mask, apply anti-fog solution or saliva to the inside of the lenses. Both create a film that helps prevent fogging.