How to deal with foggy car windows?

Causes of car windows fogging up

Vietnam is located in the tropical monsoon region, with high temperatures and high humidity all year round. This is the reason why many drivers experience foggy windshields due to moisture.

If you own a car or have simply been in a car, you have probably experienced the phenomenon of fogging up the windshield and windows. Or you may also experience the situation of the glass being steamed up, water condensing into tiny droplets. This phenomenon occurs when hot air comes into contact with cooler air. Usually, hot air from outside the car meets cold air from the air-conditioned car, but it can also happen when cold air outside meets hotter air inside the car, causing the windshield to fog up.

Fogging of car windows causes light refraction, making the driver's vision blurry, hindering vision when driving at night, in the rain, or in bad weather such as humidity, fog, etc.

Whether it's foggy inside or out of your car windows, any time you can't see clearly in all directions can be dangerous. So it's important to know how to keep your windshield clear and clear, no matter the weather.

How to deal with foggy car windows

Using glass drying system

Most current car models are equipped with a glass defroster. Therefore, when detecting signs of fogging due to condensation, users should activate the glass defroster function via the button usually integrated on the center console.

When activated, the indicator light on the control button will light up to let the driver know that the windshield defroster function is working. Note that when this function is turned on, the windows on the car should be closed, because if just one of the windows is open, the windshield defroster system will not work effectively and it will be difficult to remove the water vapor on the windshield. This is considered the fastest and simplest way to fix the phenomenon of foggy car windows when driving in the rain.

Use air conditioning system

Some older car models are not equipped with a windshield defroster, users can also remove condensation on the windshield by adjusting the air conditioning system.

The first thing to note is that you should not use hot air conditioning to treat the condensation on the glass because the condensation on the windshield is due to the temperature difference between the car and the environment. Use cold air conditioning and a reasonable air flow mode.

Choose the wind direction mode to blow on the windshield (the wind direction control button is located on the car's air conditioning system), use the appropriate wind level and temperature because if it is too cold, it is easy to cause condensation on the outside of the glass.

Balance the temperature inside and outside the car

Open the window about 10-15cm: A simple and fuel-saving way to help balance the temperature inside/outside the car, avoiding condensation. However, this method should only be applied in cases of little rain and not too cold weather, to avoid affecting the health and interior of the car.

Turn on the fan and set it to take in outside air. This is also a way to balance the temperature inside/outside the car, avoiding condensation on the glass. However, the downside of this method is that it is not very effective.

Use shaving foam or anti-fog additive

In addition to using the air conditioning system and the windshield defroster function equipped on the car, some drivers also apply the method of using a dry towel, shaving foam or anti-fog additives to wipe small areas on the car's glass surface and the side windows of the car. This method is quite elaborate but also effective in preventing condensation on the car's glass.