What to Do When Windows Fog Up While Driving in the Rain?
2 Answers
Turn on the air conditioning cold air, direct the air vents towards the window position, set the fan speed to maximum, and lower the temperature to remove the fog inside the car. Below is a related introduction: 1. Causes of Fogging: The main reason for fogging inside the car is the temperature difference. When the temperature inside the car is higher than outside, the windows are prone to fogging. Another reason is the high humidity inside the car, combined with the warm breath exhaled by passengers. When this warm air meets the cold glass, it condenses, leading to window fogging. 2. Car Air Conditioning: The car air conditioning system (air-conditioning-device), commonly referred to as car AC, is used to regulate and control the temperature, humidity, air cleanliness, and airflow inside the car cabin to optimal conditions. It provides a comfortable working environment for the driver and plays a crucial role in ensuring safe driving as a ventilation device.
Driving in foggy conditions on rainy days is quite tricky, and I've dealt with it countless times. The first step is to immediately press the front windshield defogger button, usually the one with a fan icon and wavy lines. Then turn on the A/C switch, as the air conditioning can quickly dehumidify and reduce interior moisture. At the same time, increase the fan speed, preferably to the maximum setting, directing it toward the windshield. Avoid setting the temperature too high—cold air is more effective. If the fog persists, crack open a window slightly to allow air exchange between the inside and outside, reducing the temperature difference; but be cautious of rain, keeping it open for just about ten seconds. In emergencies, such as thick fog impairing visibility, I quickly slow down and pull over to a safe area, using a dry car cloth or tissue to manually wipe the inside—never wipe while driving. For prevention, keep an anti-fog spray handy and apply it periodically to the interior glass to form a protective layer. Also, check the door and sunroof seals—damaged or leaking seals can let moisture in, so keeping the interior dry helps minimize fogging. These methods are simple and practical, and combining them usually does the trick.
