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How does Anti-fog work on swimming goggles?

Swimmer in a pool with clear goggles

How to get the most out of your swimming goggle antifog?

Swimmer with fogged swim goggles

Anti-fog - how to get the best out of it, first off; let's clear up one thing - don't spit in your goggles, don't put soap in your goggles, don't lick the lens. For that matter, keep the goggles completely dry before you get in the swimming pool; let's get into the reasons why. 

Here are some reasons an antifog can fail how to prolong its use. 

The simple dos and don'ts

  1. Keep the goggle dry before use.  
  2. Avoid creating humidity in the goggle before use by wearing the goggle prior to the session start.
  3. As the human body heats up, it sweats to cool itself down (yes, even in the water)
  4. Once the antifog is saturated and the goggle needs to be cleared, dip it in the water. Repeat as necessary.
  5. When the swim session is done, rinse the goggle in freshwater leave it to dry.
  6. Never touch the inside of the lens.
  7. Use a goggle with antifog injection works.

1. Like an ultra-thin, invisible sponge, the antifog layer eventually becomes fully saturated with moisture. Any antifog treatment has a capacity; adding water to a goggle before use expedites this result. Like a sponge drips water, the humidity inside the goggle saturates the antifog it's absorbed, rendering the protection ineffective.

2. When the antifog is saturated and the lens fogs, we've trained ourselves to wipe the googles with our fingers. This is another big no; your finger will wipe the antifog off the lens. When the antifog is saturated, the best option is to dip the goggle in water and then put it back on.

3. Anti-fog can fail if the solution does not contain the correct water-loving ingredients. To keep this simple, the type and amount of hydrophilic components in the solution is essential; more hydrophilic can absorb more moisture. That said, there's another factor that may be even more critical.

4. The lenses found in swimming goggles are made of polycarbonate. Some lenses, especially prescription lenses, have treatments, such as anti-glare, polarized treatment, or polychromatic treatment. These surfaces are hydrophobic or water-repelling.  A hydrophilic coating can be a challenge to adhere to. In scientific terms, the lenses have low surface energy. Antifog generally has a higher surface energy and doesn't bond strongly to it. To get antifog to bond to the lens, surface-active agents must be added to the formula to lower the surface energy level. The Vorgee antifog treatment is formulated to adhere to the lens surface better, so it takes more moisture to wash them away. 

Some of our options for the best anti-fog experience

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