Last Updated on January 30, 2023 by Rose Morah
Car windows fogging up can be quite annoying to deal with, especially during the cold seasons.
In this article, we will be discussing the best tips for keeping windows from fogging up without blasting the heat.
You can apply the tips when going on long road trips and during the cold and rainy seasons. They work all the time.
1. Eliminate all sources of water in the car
From experience, this is the most common cause of windows fogging up because it brings unnecessary moisture into the car.
Therefore, you need to eliminate all sources of water and fix leaks in the car. This is the first thing that I’d recommend you do.
The following are some of the preventive measures to help get rid of moisture in the car:
- Make sure the car does not have any water leaks
Sometimes the inside of your car could be getting moisture on the windows because of water leaks.
The water leaks could be from the rear window, windscreen, or any of the car windows. Additionally, it can also be from clogged drain tubes on the car’s sunroof.
I have found the best way to check if you have leaks is by taking a look at the lowest part of the boot or doing a leak test.
- Avoid getting into the car when you are wet or damp
Try to get as much mud or snow off your boots before getting into the car.
The same goes for having a damp dog in the car.
- Make sure your floor mats are dry, and door seals and the footwells are not damp
That’s because the floor mats tend to hold lots of moisture.
- Make sure you do not have wet stuff in the car
This could be wet clothes, open water containers such as coffee cups, wet umbrellas, coats, and so on.
- Open the window to allow your breathing condensation to escape
I’d highly recommend this especially if you are driving on a long road trip.
If you are doing short trips, you can open the windows when you are almost arriving at your destination or at the end of the trip to allow the moist air out of the car.
2. Check the cabin pollen filters
From experience, blocked cabin pollen filters can cause fogging on the windshield when it’s cold or rainy.
We didn’t realize this until we checked it and found that it had gone damp and moldy from the outside. After changing them, the fogging disappeared.
NOTE: Some cars will have two while others have only one.
3. Use a dehumidifier bag
If you don’t have an AC, a good dehumidifier will also do a pretty good job in the car.
That’s because it helps eliminate excess moisture and condensation in the car, which could end up causing fogging.
This actually one of the best alternatives for people who are looking for a way to defog car windows in rain without AC.
4. Use window cleaners that have anti-fog benefits
A good anti-fog cleaner works great and keeps the windows from fogging up no matter what season you are in.
That’s because it helps reduce or prevent interior fogging. Thus you don’t have to use heat to keep the windows from fogging up.
A few good examples of these products include rain X anti-fog and Aquapel Anti-Fog.
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5. Keep your car windows clean
Keeping your car windows clean will do a good job of preventing or reducing the probability of the windows from fogging up.
Therefore, I’d recommend you clean your windows to get rid of the grease, dust, grime, and so on to prevent moisture from building up.
6. Cover the car with a tarp or blanket when parked overnight outside
When my car is sleeping outside during long trips, we cover it with a tarp, especially if we are going to be leaving very early the next morning.
However, if you cover the car when it’s already covered with snowflakes, at times you may find that the tarp will stick and freeze on the windscreen. It gets even worse when you rip it off the next day and find patches on your windscreen.
And those are our best tips for keeping/preventing car windows from fogging up without heat.