Why Does Car Glass Fog Up in Summer?

[MacKhloe]

In summer, car windows fog up due to the low temperature setting of the air conditioning inside the car, which creates a significant temperature difference. Additionally, the direction of the air conditioning airflow may not be properly adjusted, such as when it blows directly onto the front windshield or the side windows. The cold air from the AC lowers the temperature of the glass, and when this cold glass comes into contact with the warmer outside air, especially in high humidity conditions, it easily forms a layer of condensation on the outside. Here are some solutions to prevent window fogging: 1. Open windows for air circulation: Crack open the side windows slightly to allow air to flow between the inside and outside of the car. When the interior temperature matches the exterior temperature, the fog will dissipate. 2. Use the AC defogging function: Press the A/C button (which stands for air conditioning cooling), lower the temperature, turn on the window defogging function, and set the fan speed to maximum. This helps evaporate moisture on the glass surface and quickly cools the window to remove fog. 3. Use anti-fog spray: Anti-fog spray works by applying a protective film on the windshield to prevent condensation.