What to Do When the Windshield Fogs Up?

[DeCali]

Solutions for a foggy windshield: 1. Turn on the hot air blower and switch the air conditioning to the external circulation mode, adjusting the air vents to the defogging setting; 2. Use an anti-fogging agent, but be aware that it may blur your vision, so avoid using it at night; 3. Open the windows slightly when the windshield fogs up to allow outside air to blow in, which will quickly disperse the fog; 4. Use a cloth to wipe the windshield if you're afraid of the cold or rain coming in through the window—just keep a towel handy and wipe vigorously whenever fog appears; 5. Apply dish soap or soapy water to the windshield, then rinse and dry it with clean water to prevent fogging.

[DeHayden]

I've been driving for over a decade and often encounter windshield fogging issues. In most cases, turning on the AC is the most effective solution: increase the fan speed, set the airflow direction to windshield mode, and switch the AC to cooling mode - the cold air can quickly clear the fog. In winter, using the external air circulation with warm air also works. For light fogging, you can pull over and wipe the glass with a clean cloth or tissue to remove moisture, but never attempt this while driving as it's dangerous. High humidity inside the car easily causes fogging, especially during rainy days or when there are many passengers. Try opening windows for ventilation for a few minutes or install an anti-fogging agent as prevention. Remember not to use internal circulation for too long to avoid moisture buildup. Once during rainy weather on the highway, my windshield fogged up badly - I immediately turned on the AC and it cleared in just ten seconds, which was crucial. Always prioritize safety - if visibility is poor, pull over to address the issue.

[McHazel]

I have two kids at home, and the car often gets damp with fog obstructing the view. I’m used to pressing the defog button, which automatically turns on the AC to blow air at the windshield—it works fast and is effective year-round. If there’s no response, I crack the window to let air circulate and prevent the kids from breathing on the glass and making it wetter. When the fog gets heavy, I pull over to wipe it with a cloth, but I take my time for safety. I keep a bottle of defogger in the car; spraying it once after washing the car keeps the windshield clear for days. I also avoid letting snack crumbs stick to the glass. When fog appears, I slow down and teach the kids to sit quietly to minimize warm breath spreading.

[CharlesFitz]

Don't panic when fog appears while driving. I turn the air conditioning vents towards the windshield, and the cold air clears it in seconds. If there's no AC, opening a window works too—just crack a side window to let dry air in. Wiping the glass takes too much time and often leaves streaks, so I don't recommend it. In winter, adjust the temperature to not too high when fog forms. Remember, when fog affects visibility, slow down and don't rush—wait until it clears.

[LeGrace]

I prioritize preventing fogging issues. Interior cleanliness is crucial: keep the inner glass surfaces dry and avoid touching them with hands to prevent oil residue; use a sunshade when parked to reduce moisture. Before driving, check the wipers and windows, and activate the air conditioning's defogging setting in advance. If fog appears, address it immediately by using the air conditioning's external circulation or opening windows for ventilation. In case of fogging inside a tunnel, pull over first before handling it—safety always comes first.