Video: Four Tips to Defog Your Window on a Cold Day

January 7, 2016 Updated: January 7, 2016
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Defrosting and defogging your window is a daily struggle on a cold day when it’s winter.

YouTube user Mark Rober, in a recent video, sought to demystify the process.

He says there’s a four-step method that’s faster than the rest:

1. Turn heater on at full blast
2. Turn AC on
3. Turn off the inside air circulation
4. Crack open the windows

Rober said he adjusted the settings in his car to come up with the method.

The fogging occurs because of the temperature and moisture differential between the outside of the car and the inside of the car.

If you’re in a hurry, car insurance provider Allstate recommends to “lower the temperature inside your car rapidly by turning on the defrost vent with cool air or cracking a window; don’t turn on the heat. This will make the inside of your car cooler and help reduce the fog. Also, turn on your car’s rear-window defogger to help clear up the back window. Though this is a fast and effective method, it could leave you shivering.”

For a more comfortable experience, it adds that one should turn on the defroster and blow the warm air across the windshield to evaporate the moisture. If the car has a recirculate feature, turn it off because that feature reuses air that’s inside the vehicle.