How to Deal with Fog on the Car's Front Windshield?
3 Answers
Methods to handle fog on the car's front windshield include: 1. Open the windows; 2. Use defogging spray; 3. Turn on the warm air from the air conditioner; 4. Activate the car's defogging function; 5. Apply a mixture of dish soap and water or soapy water to the windshield; 6. Place a dehumidifier box inside the car; 7. Wipe with a towel; 8. Increase the fan speed and turn on the cooling switch. The reason for fog formation on the car's front windshield is the temperature difference between the inside and outside of the car, where the higher temperature inside the cabin causes moisture to condense on the inner surface of the windshield, forming fog. Preventive measures include: 1. Use specialized defogging products before driving; 2. Utilize the air conditioner's cooling and dehumidifying functions to reduce air humidity.
Foggy car windows are a common issue while driving. Every time I encounter this, I first turn on the air conditioning's defogging mode, increase the fan speed to blow air onto the windshield, and use cold air to quickly lower the temperature and dehumidify, which makes the fog dissipate quickly. If the weather isn't too cold, I also crack open a window to improve air circulation, making humidity reduction more effective. The main causes are significant temperature differences between the inside and outside of the car or high humidity, such as on rainy days or when there are many passengers in winter. For prevention, I regularly clean the inside of the windows, apply anti-fogging agents to form a protective layer, or lightly wipe them with soapy water after washing the car to reduce oil film buildup. For safety reasons, never wipe the fog with your hand while driving—it's too dangerous. Pull over immediately to handle it. This method is simple and reliable; I've been driving for over a decade without any issues.
Fog formation is caused by temperature differences and humidity. I usually turn on the car's air conditioning system, activate the defogging function, or manually switch to external circulation with cold air to let the compressor dehumidify and remove condensed water droplets. When the weather is cold, switching to warm air also works, but it takes longer. The issue may involve poor air circulation inside the car. I recommend checking if the cabin air filter is clogged and replacing it regularly to ensure smooth ventilation. Auxiliary methods, such as using specialized anti-fog sprays, can be applied to the glass to form a film that prevents fog accumulation. If the air conditioning system is aging, opening the windows provides a temporary solution. Keeping desiccants inside the car can also help absorb excess moisture. Understanding these principles makes handling the situation more effortless.
