why can’t you just wipe a foggy shower mirror clean?

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why can’t you just wipe a foggy shower mirror clean?

In: Chemistry
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You can, you just haven’t wiped away the temperature differential between the glass and the air in the room. So it immediately refogs.

In addition to what SocialForceField said, you can temporarily mitigate the temperature differential by spraying hot water on the mirror for a short time. It’ll cool off rather quickly, but should give you some time to use it.