How to Prevent Car Windows From Fogging

July 6, 2018 @ 6:23 pm
foggy windows

How to Prevent Car Windows From Fogging

Whether you’re dealing with cold winter weather or you live in a highly humid area, car windows can fog and create safety hazards and ugly marks. If you’re hoping to prevent your car windows from fogging, here are a few of our favorite tips. 

Use your heater

Turning your car or truck’s heater on will warm windows during cold weather to prevent dew from forming. It’s also a good idea to use the windshield heat function and not the recirculation function; recirculation pushes dewy air through the car, which will make back windows fog and condensate. 

Use your air conditioner

During hot weather, or just in areas where there is a ton of humidity in the air, turning the A/C on high can dry out the moisture that leads to window fog. Let it run before you drive away to dry out the moisture. Then you can turn it off if you want; you don’t have to freeze the entire drive.

Roll down the windows

When it’s less humid outside than it is in your car (i.e. if you have a lot of warm bodies breathing on your glass), roll down the windows. This dries out the air and also prevents glass from forming condensation. Obviously, don’t do this when it’s raining outside.

Don’t bring wet stuff into your car

Leaving wet umbrellas, boots, towels or even people can lead to damp environments in your car that will lead to fogging. Shake off wet items before putting them in your trunk, rather than on the floorboards in the cabin. Give wet humans and animals towels to keep dry (do not put them in the trunk). 

Clean your windows regularly

Ever notice how your windows seem to fog more after the first big fog? That’s because the condensation/fog leaves a residue that makes it easier for moisture to attach next time. To prevent this, as well as to stop dust and oil from building up, clean windows regularly. Window cleaning products work well, or you can buy car-specific products. Just use a lint-free rag and clean both inside and outside your windows. Let them fully dry before you roll them down, but leave doors cracked so you don’t have chemical fumes seeping into your car seats. 

Use anti-fog products

Anti-fog products coat the window so that no moisture can cling to it, and also make it less likely to accumulate dust and oil. When applying these products, make sure to use lint-free rags to apply it evenly. You may also need to wipe them down the next day, once the product has settled into the glass. Leaving car doors open while these anti-fog sprays set is a good idea, as the fumes can be intense. 

In case of emergency, use towel

If you find yourself in a situation where you can’t stop the fog and it’s impacting your ability to see through your windshield or windows, use a towel. It’s a great idea to keep a towel in your dashboard compartment or trunk for instances just like this. Before you drive away, or if you need to pull over, grab the towel and thoroughly dry your windows inside and out. Make sure to turn on the heat or A/C as you do this, so you dry out the air inside your car as well.