Even if your goggles stay firmly on your face, the ill-prepared may have a dilemma once they jump in the water.
Fog.
Your goggles will start fogging up if you're not careful, and the reason is simple. Your face (inside the goggles) is warmer than the area outside of the goggles—in this case, the water. Condensation creates fog that is a pain in the butt for swimmers in the middle of a hard workout or, even worse, a race.
This is an issue as old as goggles, and stories have been passed around the triathlon and swimming circles on how exactly to combat this nuisance.
Here are some of the more common solutions:
Saliva
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You can budget for a fog-free solution, but your own spit is a cheap and surprisingly effective short-term fix to prevent fogging. Many swimmers, due to the sensitivity of the eyes, would never put anything in their goggles other than a nice loogie.
Rubbing saliva around the inside of your goggles will add a layer of water to the lens that will prevent condensation from forming. And for a while, that will leave your goggles fog-free.
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Your Next RaceAnti-Fog Spray
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An anti-fog spray market has developed to address this problem. Companies like AquaSphere, TYR, Speedo, Frog Spit and one so brilliantly named Cat Crap has anti-fogging products that work for swimmers, scuba divers, snowboarders and more.
The directions for most of these indicate to apply it to your goggles and after a short time, clean it out. It's important to clean it out—otherwise, this can get into your eyes and pretty much ruin your day.
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Your Next RaceBaby Shampoo
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Yes, many swimmers carry a small bottle of baby shampoo with them. Put a drop or two in each lens, wait 15 minutes, rinse it out and enjoy a fog-free swim. Seriously. Like the spray, the baby shampoo will leave a layer of transparent film on the goggle that won't let the condensation do its obnoxious thing.
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Your Next RaceToothpaste
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This works similarly to shampoo, creating a film that blocks condensation from blocking your vision. This is a favorite tactic of the scuba diving community, but triathletes and swimmers can certainly steal the idea.
One more thing: Many goggles come with an anti-fog coating, but it wears off easy with your fingers. Avoid touching the inside of your goggles with your fingers to keep that barrier in place for as long as possible.
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