How to Quickly Remove Fog Inside the Car on Rainy Summer Days?
4 Answers
This is the simplest method: just turn on the front window defogging mode, set the fan speed to maximum, turn on the A/C switch, and then adjust the temperature to the lowest setting. Opening the windows can increase air convection, reduce the temperature difference between the inside and outside of the car, and weaken fog formation. This method seems economical, but it is actually suitable for very few situations. When using it, simply spray it evenly on the glass surface and then wipe it clean with a dry towel. The principle is to use a surfactant method to form a protective film. Mix dish soap and water in a ratio of 1:6, spray and wipe before traveling, and the effect is comparable to commercially available defogging agents, although the durability is slightly worse.
As a driver with over 20 years of experience, I've gained plenty of knowledge on dealing with foggy car windows during summer rains. The main cause is the large temperature difference—high humidity outside and stuffy, hot air inside condensing on the glass. The quickest way to defog is to turn on the AC in cold air mode and activate the external air circulation, directing the cold air toward the windshield. This usually clears the fog in minutes. If there are many passengers, I slightly lower the windows to speed up air exchange. Carrying a microfiber cloth is also handy—spraying some cleaner and wiping the glass helps prevent fog buildup. Remember not to drive when the fog is severe, as blurred vision is dangerous. Regularly maintaining interior dryness and checking the AC filter can prevent issues beforehand. Once it becomes a habit, this problem occurs much less often.
Every time I take my kids out in the summer rain and the car windows fog up, I get quite nervous, fearing it might affect safe driving. For quick defogging, I prioritize using the car's built-in defogger button, which directly blows air onto the windshield for the fastest effect. At the same time, I lower the air conditioning temperature and switch to external circulation to let fresh air in. For the kids' comfort, I always keep a bottle of anti-fog spray in the car—a few sprays and a gentle wipe with a soft cloth can clear the fog, but avoid doing this while driving to prevent distraction. When the car is parked, opening the sunroof or a window crack to ventilate can reduce humidity. Safe driving in the rain is more important; if you notice an issue, find a safe place to pull over and handle it rather than pushing on.
As a tech enthusiast, I'm particularly fascinated by automotive technology, and there are quite a few smart solutions for summer car fogging issues. The coolest feature is the automatic defogging system now built into new cars. Once activated, sensors detect humidity and automatically adjust the air conditioning's fan speed and temperature to quickly disperse the fog. You can even use a smartphone app to remotely start the AC and precool the car, preventing fogging on rainy days. If you don't have these advanced features, manual operation is simple too: turn on the AC's cold air, set it to maximum airflow directed at the windshield, or open the front window defrost vents. Remember to regularly maintain the AC filter, and new features like smart air vents can make defogging even more efficient. These little tricks can make driving much more worry-free.
