The dashboard setting that clears windshield fog faster, and why warm air plus A/C works better than people expect

Windshield fogging, a common driver frustration, can be quickly resolved by using the air conditioning, even in cold weather. Automakers explain that the A/C dehumidifies the air, preventing condensation on cold surfaces. Combining warm air with the A/C and drawing in fresh outside air is the most effective method for clear visibility.