What causes a windshield to fog up on the inside? I understand it’s related to the differences in temperature, but that’s as far as I understand. What can one do to resolve it?
Sorry if the flair is wrong 🙂
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u/mr-photo gave a good answer as to why it happens. I’ll add that while the car is not fully sealed to the exterior, it can still take some time for the conditions inside the car and outside to equalize. Add humans in the car adding moisture from breathing, etc. and you will have slightly more humid air in a car quite often, even after the humans are gone from the car. If it gets cold enough outside, you’ll get the condensation on the inside of the windshield.
>What can one do to resolve it?
That’s what the defrost setting on your car’s climate control is for. Then you wait for it to defog before you are on your way to drive.
You could also leave the car windows cracked open, but if there’s snow rain, wildlife, etc. around, it isn’t necessarily a great idea.
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