What are some tips to prevent car windows from fogging up?

[StJuliet]

Tips to prevent window fogging: 1. Apply cleaning products: Toothpaste can prevent car windows from fogging up. Apply toothpaste to the windows before driving and wipe with a cotton cloth—this effectively prevents fogging. Besides toothpaste and anti-fog agents, using diluted dish soap or soapy water to wipe the windows also helps. 2. Turn on the AC: Whether using cold or warm air, turning on the AC speeds up defogging because the air conditioning compressor has a dehumidifying function. 3. Crack the windows: After defogging, leave a small gap in the windows to allow air circulation inside the car, balancing the interior and exterior temperatures. 4. Use the external air circulation: The principle is the same as opening the windows—both methods draw outside air into the cabin.

[GenevieveRose]

As an ordinary car owner who drives every day, I often use some handy tricks to prevent foggy windows from affecting visibility. The most common method is using the air conditioning to dehumidify: after starting the car, press the defog button (the one with the windshield icon), set the temperature a bit lower to blow cold air for quick dehumidification, then switch to warm air once the fog clears. Another trick is applying a little dish soap solution to the windshield, wiping it evenly with a cloth to create an anti-fog layer—works great. On rainy days, slightly opening a window for ventilation helps reduce moisture buildup effectively. I also always keep a bottle of anti-fog spray in the car; it costs just a few bucks and lasts about a month—spray it in advance to prevent fog from forming. These simple, cost-effective methods prioritize safety, especially in winter or the rainy season, helping avoid accidents caused by blurred vision. Making it a habit to check the cleanliness and anti-fog layer condition of the windows inside and out saves both hassle and worry.

[EdwardRose]

After years of driving, I've found that solving foggy windows can't wait! I immediately press the defog button on the AC, set the air mode to blow towards the windshield, adjust the temperature to slightly cool, and increase the fan speed – the fog clears in seconds. On humid days, I wipe the interior glass surfaces dry to prevent moisture buildup. Applying professional anti-fog agents creates a protective film that lasts, making driving more reassuring. For safety, slow down when windows fog up, turn on interior lights to alert others, and avoid collisions caused by obscured vision. Simple measures like cracking windows for ventilation or placing moisture-absorbing bags in the car can effectively prevent fogging issues long-term.

[Luis]

I often encounter fogging issues on my windshield while driving. Using the air conditioning defog mode is quick; applying soapy water to wipe the windshield is simple and cost-effective; purchasing anti-fog spray works effectively when applied; cracking the window slightly reduces temperature differences to prevent fogging. Safety comes first—ensure clear visibility and avoid distractions while driving. Regularly cleaning the glass is also useful—don't wait until the fog is severe to deal with it. There are many little tricks—try them out and choose a suitable habit.