eli5: Why do windshields fog up on the inside?

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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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5 Answers

Anonymous 0 Comments

if the temperature outside the car is colder than inside the car, the glass itself will be cold and any warm moist air inside the car will condense on that cold surface. Just like if you take a ice cold drink outside on a warm humid day, the cup will get all wet on the outside of the glass, that’s just the warm moist air condensing on the surface of the cold glass.

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