Why Does the Outside of Car Windows Fog Up?

[IsaacLee]

The reason for fogging on the outside of car windows is that the temperature of the gas outside the car is higher than that inside the car. Solutions to remove fog from the outside of car windows include: 1. Air conditioning cooling to defog—turn on the air conditioning to blow cold air toward the front windshield and use the dehumidification function to remove fog; 2. Using detergent-type antifogging agents; 3. Applying antifogging spray—spray it on the fogged windshield and wipe it dry with a cloth for immediate clarity; 4. Rain deflectors for defogging—utilize properly designed air deflectors to reduce wind resistance, direct airflow toward the side mirrors, and accelerate the evaporation of water droplets and fog; 5. Using the external air circulation system to defog; 6. Activating the rear window heating to remove fog; 7. Slightly opening the window to allow air convection and reduce temperature differences.