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How to Stop Eyeglasses From Fogging While Wearing Facemask

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Last Modified: 2020-04-06
I need to wear a facemask and I don't wear contacts.

I remember there being something you can wipe on your eyeglasses  --before using-- to prevent them from fogging.  Anyone remember what that was?
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Dr. KlahnPrincipal Software Engineer
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Commented:
There is a product called Rain-X which is available at all auto parts stores and probably at Walmart as well.  It's intended for windshields but I see no reason it couldn't be applied to eyeglasses without protective coatings.  However, if your glasses are coated I wouldn't try it because Rain-X lists acidified something-or-other in the ingredients.  It wouldn't need much acid to eat off metal-based anti-glare coatings.

As SCUBA divers we spit in the masks before going diving and it worked splendidly.
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Any kind of detergent wiped over the inside surface works the same way as spit! A tiny spot of neat dishwashing liquid wiped on the inside of glasses works well. Also if you're getting misting then your glasses are at a lower temperature that your breath so just running them under hot water will fix this too!
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David Johnson, CDSimple Geek from the '70s
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brothertruffle880Working Stiff Trying to Make a Living

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