A mask that keeps fogging all the time makes it impossible to enjoy the snorkeling trip and it is also dangerous because it prevents you from seeing the objects around you clearly, thus increasing the risk of suffering injuries. Fortunately, there are a number of easy ways to keep your mask from fogging – here are some of them.
The easiest way to prevent water from getting under your mask and fogging your vision is by choosing a mask that fits your face perfectly. Choose a mask that comes with as wide a skirt that you still feel comfortable with – the better the fit, the less likely it is to get fog inside your mask.
You should keep your mask on for as long as possible during the trip. Whenever you take it off, moist air gets inside the mask. When you put the mask back on again, the moist air condenses and fogs the interior surface of the mask. The same happens if you breathe out too vehemently through your nose while your head is underwater, so you should try to reduce nasal exhalation to the minimum.
You can also choose to apply a mask defog cream, liquid, spray or foam on the interior of the mask lens. Apply a thin layer of defogger on the inside, keep it on the lens, then rinse the mask in fresh water without rubbing, in order to avoid scrubbing off the defogging film. Some products work better if they are kept on overnight – you can apply your defogger in the evening and rinse the mask the following morning.
There are a number of other methods you can use to prevent mask fogging. Most of them work on the same principle as the application of a mask defogger and involve the use of a substance that creates a thin film on the lens:
Apply non-gel toothpaste on the lens (the simpler the paste, the better), and then rinse the mask gently after a few minutes;
Windshield cleaners provide the same efficiency and they are available everywhere;
Washing the mask with a mild soap will give you the same effects;
Saliva also has a fog preventing effect, so if you have no other solution at hand, simply spit into your mask and spread the saliva on the interior of the lenses, then rinse off the excess. It is a simple method that you can use when you are already in the water.
The truth is that, no matter how tightly your mask fits and no matter which of the above fog prevention methods you use, you will still experience at least a little bit of fogging, you cannot defeat the rules of physics. There is one more thing, though, that you can do to reduce the amount of fog you get inside your mask while out on the sea: never put your mask on your head when your head is out of the water and you are not actually using the mask. Your body is warmer than the air around you and the vapors generated by your body heat also increase mask fogging.