Why Are My Car Windows Fogging Up Inside?

Make sure your windshield is clean. If there is dirt or grime on your windshield, it will cause moisture to condense on the glass and collect as fog. You can use a squeegee or paper towel with water to wipe off any dirt or grime buildup, then dry off with a clean cloth or paper towel.

Adjust the temperature in your car so it matches outside temperatures as closely as possible if it’s too hot in your car, the humidity will condense on cold surfaces like windows and mirrors because cold air can hold more moisture than warm air does.

Make sure doors aren’t open too long keeping doors closed helps keep warm air inside of cars where it belongs.

The air conditioner is on too high

The air conditioner is on too high. If your car windows are fogging up inside, you may have the air conditioner set to a temperature that’s too cold. This is one of the most common reasons for foggy windows in cars.

To fix this issue, turn the temperature down by 1 or 2 degrees and see if it clears up the foggy window problem.

The windows are dirty or have residue on them

The most common cause of foggy windows is a buildup of dirt, dust, and grime on the inside of your car. This can happen if you haven’t cleaned your windows in a while and it can also happen if your car gets a lot of sun exposure because it’s parked in front of a window or near an open door.

If you notice that you’re having this problem often, try cleaning the inside of your car more regularly once a week should be good! If you don’t have time for all that, there are products like Rain-X that can help repel water from the surface of your glass, making it less likely to fog up when it rains or snows outside.

You can also try wiping down your windshield with rubbing alcohol or vinegar mixed with water before washing it off so that any leftover residue will come off easier when you do finally wash it down later on down the road.

The defroster may not be working correctly

If your windows are fogging up inside your car, it’s usually a sign that the defroster isn’t working properly. The defroster helps keep the windows clear by removing excess moisture from them, which can cause fogging.

If your windows are fogging up inside your car, try turning on the defroster to see if it fixes the problem. If so, then you just need to make sure that it’s turned on when you start driving. Then you may need to replace the part or system that causes this problem in order to fix it once and for all.

How do you prevent foggy windows inside your car?

Turn off the heat or AC in your car when you leave it at night or during periods where it won’t be used for long periods of time. This will help keep moisture away from the windows so they don’t fog up when you turn on your heat or AC later in the day.

Leave your windows cracked open an inch or two while parked outside overnight so that any moisture left behind by rain or snow can evaporate before starting up again in the morning! This will ensure no moisture stays behind on surfaces that could potentially cause foggy windows inside your car during the winter months.

What to do if you have foggy windows in your car?

The first thing to do is check the weather outside. If it’s raining or snowing, your windows are going to fog up more easily. This is because the moisture from the air will be attracted to the cold glass and condense it.

So if it’s rainy or snowy outside, make sure you turn on your defroster (which will help dry out any moisture on your windows) and roll down your windows for a few minutes when you get home so that all of the water can evaporate from them.


The reason your car windows are fogging up is because of the moisture in the air, and it’s a problem that can be easily fixed. If you’ve just started noticing this problem, it may mean that your defroster is broken or not functioning properly. You should have your windows tinted to prevent this from happening in the future.

You can also try rolling down a window slightly to let some of the moisture out. If you’re still having trouble after trying these things, contact us at for a free estimate on repairing your defroster or getting your windows tinted.

Steven Hatman
Steven Hatman

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