4 Reasons Why Your Windshield Fogs Up

4 Reasons Why Your Windshield Fogs Up

If you’re constantly struggling with fogging up your windscreen, you’re not alone. The inside of your windshield is just as dirty as the outside, and a slight, translucent film forms on the surface. Unfortunately, trapped moisture loves to fog your windshield. If you don’t want to face a hazy windshield and have to spend countless hours trying to remove the fog, here are some tips to help you resolve the issue.

Cold air

Do you know why cold air causes your windshield to fog up? Most car owners have at one time or another experienced this problem. In this article, we will take a look at the causes of windshield fogging, how to prevent it, and what you can do to avoid it. It is important to have a clear windshield at all times. If you are constantly driving, you may want to turn the air conditioning up, or at least turn down the heat. Neither of these situations is good for you.

Fogging occurs when warm air in your car collides with the cold air outside. The warmth of the air then loses energy and the water molecules move slowly and tightly enough to condense back into water droplets. As a result, the glass will become fogged and obscure your vision. There are several ways to fight fog, including using anti-fogging sprays. Anti-fogging sprays are easy to find at your local supermarket or online.


When temperatures drop, a higher proportion of water condenses into water vapor. This is what makes windows foggy. Air is also warm and humid if several people are inside the vehicle. Warm, humid breath can also cause condensation on the windshield. When this occurs, the water molecules on the glass bond together, increasing the surface tension of the glass. Eventually, the water beads up on the glass and obscures the driver’s vision.

While it may seem inconvenient, preventing windshield fogging can be an easy and convenient solution. First, check the temperature of the vehicle. If you’re driving in a cold climate, you should turn up your air conditioning to avoid this problem. However, this may not be enough to stop fogging. In this case, de-fogging the glass will not reduce the fog.


If you’re driving, you’ve probably noticed that your windshield fogs up on cold mornings. This is because the cold air condenses water vapor and forms a thick layer of frost on the glass. This fog is also influenced by de-icer sprays and the sun’s rays. The sun’s heat also produces steam, which forms a layer of fog on the windshield. The resulting film of water vapor is also caused by dirt on your windshield.

To get rid of moisture from the car’s cabin, open the windows and engage the defroster. If this doesn’t help, turn on the heater and defroster to dry out the cabin air. Using the heater or air conditioner will also help to dry the air inside the vehicle. However, you should remember that these methods are only effective in conditions that are above freezing. To prevent fogging, open the windows while driving or pull over to a safe location. Don’t drive with your vision impaired.

Air recirculation system

Getting your car serviced for the cabin filter and HVAC system may solve you’re fogging up the problem. HVAC systems control the car’s temperature. When your system is malfunctioning, the windows will fog up. If you want to avoid fogging up windows, try to avoid using hot air in your car and start your engine at a normal temperature. While hot air may seem like a solution, it can actually make the problem worse for ten to twenty seconds. You should use the air recirculation system if you need to get the most out of your air conditioning system.

If you find your windows foggy up despite turning the air conditioning system off, it can make driving more dangerous. The recirculation system traps humidity inside the car, which can cause misting up of the windscreen. To counter this, you can turn off the recirculation function altogether. This can balance the temperature difference inside the car and minimize fuel consumption. This can be a big saving in fuel bills.

Windshield Replacement Experts in Your Area

If you need extra tips on how to defog your car windshield and other tips, you can contact Low Price Auto Glass, we are your local windshield repair expert. Our experienced technicians are ready to help you with your window inquiries. Call (760) 489 6700 or use our online quote request form.

Author: Low Price AutoGlass Escondido

We are your one-stop shop for auto glass replacement in North County. We’ve been providing quality windshield replacement and repair for all makes and models of vehicles to the entire North County of San Diego since 1999. We offer you FREE AUTO GLASS QUOTES and SAME DAY service if needed. We have a reputation for using the best quality auto glass and materials in Escondido.

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