Why Does Car Glass Fog Up When Exiting the Garage in Summer?
2 Answers
In summer, car glass fogs up when exiting the garage due to the lower temperature and underground humidity inside the garage compared to the higher outside temperature, creating a temperature difference that causes fogging. Here are methods to clear the glass fog: 1. Park the car outside the garage in advance: Allow the car to fully acclimate to the higher outside temperature, and the moisture will naturally evaporate, preventing fogging. Open all doors and windows while parking to quickly alleviate the issue. 2. Ventilate by opening windows: If you need to drive urgently, simply open the windows to allow air circulation. The breeze will quickly remove the stored humidity from the garage, and the fog will dissipate naturally within minutes. 3. Use anti-fog products: Nowadays, there is a wide variety of car care products available, including anti-fog solutions. Keep a bottle handy and spray it before exiting the garage to prevent fogging issues.
I totally get this issue. In summer, fogging on the windshield after leaving the garage is mainly caused by the temperature difference and humidity. The garage is damp and cool, and when the car suddenly encounters the hot and stuffy outside air, the windshield fogs up instantly, just like a chilled soda can on a hot day. This is especially noticeable on rainy days when evaporating rainwater increases the humidity. The cooler windshield causes the warm air to condense into droplets. My suggestion is to turn on the external air circulation before getting in the car and slightly lower the windows to allow airflow between inside and outside. If fog has already formed, immediately turn on the air conditioning with the coolest setting and direct the airflow toward the windshield at maximum fan speed—it usually clears up in seconds. Also, try not to park with the front of the car facing a wall; leaving some space for heat dissipation can help reduce the temperature difference.