What to Do When the Car Fogs Up After Coming Out of an Underground Garage in Summer?

[DeEmery]

Don't rush to turn on the air conditioning for cooling. First, open all the windows to ventilate and speed up the warming of the front windshield. Once the front windshield warms up, the fog will disappear on its own. If the fog is on the inside, turn on the air conditioning with the AC cooling and set it to blow air on the front windshield to defog, while slightly opening the side windows. Related tips are as follows: 1. Using Air Conditioning to Defog: Using the air conditioning to defog is a common method. Turn on the cold air to blow on the glass, and the defogging effect is immediate. However, people inside the car will feel very cold, and if the humidity inside the car isn't removed, the fog will reappear on the glass soon. 2. Using Hot Air to Defog: Using hot air to defog is more effective than using cold air, but the effect takes longer to appear. Once the hot air dries the moisture inside the car, the glass won't fog up again for a long time. It's best to turn on the hot air while parked and then wipe the windshield with a cloth. Additionally, turning on the external circulation while driving can also help prevent fogging to some extent.

[DelJoel]

I've encountered this issue many times. In summer, when driving out from a cold garage, the windows fog up instantly, which is quite annoying as it blurs the vision. The simple reason is the temperature difference—the garage is cool while outside is hot, causing condensation on the glass. My solution is to turn on the air conditioning immediately after starting the car, set it to maximum cold air in windshield defogging mode, and slightly open the windows for ventilation. The fog usually clears in about a minute. If there's no air conditioning, immediately open both side windows to circulate air and balance the temperature. As a preventive measure, a few minutes before parking in the garage, roll down the windows or preheat the car to reduce interior humidity. Keeping a dry cloth in the car to wipe the glass surface also helps. Avoid using hot air for defogging in summer as it's less effective and wastes fuel. Above all, safety comes first—don't rush to drive off; make sure you can see the road clearly before moving.

[ODawson]

Dealing with fogging is something I can handle easily, with the focus being on prevention. In summer, the garage is comfortably cool, but stepping outside into the high heat and humidity can cause issues. To avoid this, I often start the car in the garage and don't rush to drive off. Instead, I turn on the air conditioning in defogging mode for a while to stabilize the interior temperature and balance the difference between inside and outside. Additionally, I've made it a habit to check if the air filter is clean, as a dirty filter can reduce dehumidification effectiveness. I've also tried a homemade anti-fog solution—a mix of dish soap and water—lightly wiping the glass to reduce condensation without leaving marks. When parking, I make sure not to leave damp items on the seats to keep the interior dry. These preventive measures have saved me a lot of trouble and made driving more reassuring.

[GavinLee]

In summer, when turning on the AC and driving out of the garage, fog appears immediately. My quick solution: simply turn on the cold air directed at the windshield defogging button. The large temperature difference between the cold garage and hot outside causes condensation. Opening the windows for ventilation or using the external circulation can help balance the temperature faster. Avoid touching the glass randomly to prevent smudges. When fog appears, prioritize defogging to ensure clear visibility and safety, and avoid distractions. Keep it simple and efficient.