Why is the defogger not working?

[DeTeagan]

The reason for fogging on the car windshield is due to the temperature difference between the inside and outside of the car and air humidity. If the air conditioning doesn't work, it means the direction of the air vent blowing on the glass is incorrect or not turned on. Here is relevant information: 1. Solutions: Turn on the cooling to lower the interior air temperature to match the outside; turn on the heating to equalize the glass temperature with the interior. Therefore, theoretically, you can turn on the cold air conditioning or open the windows to lower the interior temperature for defogging; you can also turn on the hot air conditioning to blow on the glass to reduce its temperature for defogging. 2. Car windshield: The development of modern car designs is closely related to advancements in glass technology. Over 40 years ago, single-piece curved windshields were already being used in cars, gradually replacing flat windshields.