This method works best on a dry mask, just like the others, so dry off the inside if you can. The best way to dry it off is to use a towel off the boat you’re diving from.
Defoggers can be found where you buy diving supplies. Some defoggers are sprays, while others are drops.
If it’s the first time you’re cleaning the mask (conditioning it), you can rub the lens on the outside, too. Conditioning just means you’re cleaning it for the first time after buying it, and it needs extra cleaning to get the manufacturer’s oils off of it.
If you’re conditioning your mask for the first time after buying it, you’ll want to let it dry, and then repeat the process about 5 times.
