Why Does My Snorkel Mask Fog Up?

A snorkeling mask that gets foggy can mar your whole experience, and also ruin your views of coral and fishes. It can also damage the ease of communication between you and other divers, causing danger to you. You can get distracted enough to lose track of your surroundings or your buoyancy. Find out about some of the main causes of fogging of your snorkeling masks.

Residues from manufacturing process

Often, there are residues left on the lens of new scuba diving masks from the manufacturing method. Until you get rid of the coating from the inner side of your lenses, you will find the mask fogging up continuously. This will occur irrespective of the defogging agent that is utilized.

You can remove the residues in two ways. You may use squirt toothpaste on your lens inside and use a soft cloth or finger to rub it about for some time. You can also use the flame trick to get over this problem. Until your glass gets black, run the flame over the lens insides. This will ensure that there will be no residue to irritate your eyes in any way.


It is generally perceived that contaminants in water are a major cause of fogging of masks. Over a period of time, contaminants and oils can accumulate on the lenses. This can lead to a layer atop the lens, and increase fogging. Divers generally agree that the use of soft detergent or mild liquid soap can be very useful in getting rid of such contaminants. These can also offer a clean surface to ensure professional-grade anti-fog solutions.

Although many people also use spit, it is not a suitable defogger. Spit makes it likelier for bacteria as well as other microbes to get into the crevices and cracks of masks. This leads to a negative cycle of constantly trying to keep a snorkeling mask contaminant-free and clean. It is better to use a basic baby shampoo mixture to scrub the lens and rinse it.


It is also possible to find moisture attaching to the minute flaws in the lens glass. This is the reason why it is important to use baby shampoo or anti-fog products. These serve like surfactants and can decrease the surface tension of the water that is condensing, which makes water / moisture less likely to stick to lens glass. Many people depend on costly anti-fogging agents to ensure cleaning before diving.

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