How to Remove Fog on Car Windows When Using Air Conditioning?

1 Answers
VivienneRose
07/29/25 3:53pm
"Fog on car windows when using air conditioning can be removed by opening windows for convection, using the air conditioning system, or applying defogging agents. Window Convection: If the fog inside the car is not too heavy, you can slightly open the side windows to create airflow between the inside and outside of the car. This reduces the temperature difference, and the fog will gradually disappear. The principle of this method is the same as using the air conditioning cold air, but it does not increase fuel consumption. However, the downside of window convection is very obvious—it cannot be used during rain, snow, on highways, or when the fog is heavy. Additionally, opening the windows will lower the temperature inside the car. Air Conditioning System: Using the air conditioning system is the most common method to remove fog. Almost all cars today have air vents located below the front windshield. Simply adjust the air conditioning to the appropriate setting, and the airflow from the vents will help clear the fog. If you're in a hurry, you can use cold air for an emergency solution. However, in most cases, it is recommended to use warm air. Turn on the car's fan and the cooling switch, and the cold air blowing onto the front windshield will quickly dissipate the fog, providing an immediate effect. The biggest drawback of this method is that it can make the occupants feel cold. Defogging Agents: Spray a defogging agent onto the inner surface of the car window and wipe it clean. This not only removes dirt from the glass but also forms a protective film that prevents moisture from condensing into fog. One application can last for about ten days. Prices range from a few dollars to over a hundred dollars. You can also make your own defogging solution. The simplest method is to mix dishwashing liquid with water in a 1:10 ratio. Then, use a clean, soft cloth to apply it to the inside of the front and rear windshields. Alternatively, you can pour the solution into a small spray bottle for easier application. "
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