How to Deal with Fogging on the Inside of the Car Windshield?
3 Answers
Fogging on the inside of the windshield is primarily caused by the condensation of small water droplets when warm air inside the car comes into contact with the cooler windshield surface. Here are four solutions to address this issue: 1. Turn on the heater. Activating the heating system will quickly dissipate the fog. (Some vehicles feature a one-touch defogging function.) 2. Open the windows. This helps to release the warm air. 3. Apply chemical solutions. Applying these to the windshield can prevent further fogging. 4. Use the air conditioning for defogging. Adjusting the interior temperature to match the exterior temperature will help the fog to dissipate.
I have plenty of experience dealing with foggy car windshields, especially when driving in rainy weather. Fogging usually occurs when high humidity inside the car meets the cold glass, causing condensation. My first move is to turn on the air conditioning's dehumidification mode, setting it to blow cool air directly at the windshield to quickly reduce humidity. If the weather is cold, I switch to the warm air mode to heat the glass and evaporate the moisture. Many cars have a dedicated defogging button—pressing it automatically activates the fan and compressor to assist. When the fog is too heavy, I slightly open the window by a few centimeters to allow air circulation and disperse the humidity. Before every drive, I clean the inside of the glass to prevent dust from attracting moisture. Prevention is key—keeping a bottle of anti-fog spray in the car and applying it regularly can significantly reduce fogging frequency. Most importantly, if visibility becomes poor, it's crucial to pull over and address the issue rather than pushing through.
As a young driver, I often encounter windshield fogging, especially when the AC is just turned on or when there are many passengers. My method is to directly start the car's air conditioning, set it to maximum airflow and direct it towards the windshield—cold air can quickly disperse the fog. When it's cold, I use warm air to dry the glass surface. If the car feels stuffy, I slightly open the windows to let in some fresh air. During regular maintenance, I clean the inside of the glass more often to keep it cleaner. Using the AC defog button is the easiest solution—it clears up in seconds. I also remind passengers not to talk directly towards the glass to reduce exhaled moisture. These small things may seem simple but are very practical, as windshield fog must be dealt with immediately to avoid accidents while driving.
