Why is there fog inside the dashboard?

[OwenRose]

Fogging inside the car dashboard occurs due to high humidity inside the vehicle. Here are the relevant explanations: 1. Window ventilation: If the fog inside the car is not severe, you can open a small gap in the windows on both sides. This allows air convection between the inside and outside of the car, reducing the temperature difference and gradually dissipating the fog. The principle of this method is the same as using the air conditioner to blow cold air, but it does not increase fuel consumption. However, window ventilation has obvious drawbacks: it is not suitable during rain or snow, on highways, or when the fog is heavy, and it also lowers the temperature inside the car. 2. Air conditioning system: For most car owners, using the air conditioning system to defog is the most common method. Almost all cars on the market today have air conditioning vents under the front windshield. Simply selecting the appropriate air conditioning setting can use the air blown by the air conditioner to remove the fog.