How to stop your glasses from fogging up when you wear a mask
Updated 0205 GMT (1005 HKT) April 22, 2021
(CNN)It's a pesky problem: As soon as you strap on your cloth face mask and head out the door, your glasses fog up.
Your specs fog up because the mask directs your breath upward instead of in front of you, which is good for preventing disease transmission but bad for anyone with less-than-stellar eyesight.
Soap and water act like a cloak that reduces surface tension on the lenses. This magic mix allows the water molecules from your breath to distribute evenly, rather than cluster on your lens in a way that makes it difficult to see.