How do I Remove Fog from Car Glass During the Winter?


By  AIS Windshield Experts

Category:  Car Windshield

To Remove Fog from Car
As the cold weather rolls in, a common frustration for drivers is having to deal with foggy windows obstructing vision. Not being able to see properly out of a vehicle’s windows is more than just an inconvenience – it’s dangerous, as visibility is critical for safe driving. Maintaining clear sight lines should be a top priority for all motorists. In the article, we’ll discuss how to remove fog from car windshields in winter.

What Causes Windshields and Windows to Fog Up?

Fogging occurs when moisture in the air inside the car condenses on cold glass. This moisture comes from several sources:  
  • Breathing and perspiration from passengers
  • Wet gear like shoes, clothes, bags, etc.
  • Rain or humidity seeping into the car
  The moisture condenses when it makes contact with windows considerably colder than the inside air temperature. Factors like cold conditions outside, quick warmup of the interior, and poor airflow can worsen condensation and fogging. Learning how to remove fog from car windshields in winter is crucial for maintaining clear visibility.

Immediate Solutions to Clear Fogged Glass

Drivers can significantly improve their safety and comfort by mastering the methods of how to remove fog from car glass in winter. If your car windows have already fogged up, there are a few quick things you can try to clear them:  
  • Turn Up the Heat: Adjust temperature controls to high heat settings and point vents toward problem areas on the windshield and side windows. The increased airflow and heat help equalise the temperature.
  • Use the AC: It may sound counterintuitive, but switching the air conditioning and heat can help dehumidify air and clear condensation more quickly. Make sure air recirculation is turned OFF so it pulls in dry air from outside.
  • Crack Windows: Opening windows a small amount allows moist inside air to escape and be replaced with drier outside air. Just take care to avoid letting in too much cold air at once.
  • Adjust Air Direction: Pointing dashboard vents upward at the base of the windshield so the airflow crosses the glass and pushes humid interior air up and out open windows. Avoid aiming vents right at glass surfaces.

Long-term Prevention of Foggy Windows

While quick fixes can get rid of existing fog, there are also some habits drivers can build to help minimise window condensation issues in the first place:

  • Get HVAC System Checked: Have your car’s heating and cooling system inspected yearly and replace cabin air filters as needed so they run efficiently. Problems like refrigerant leaks can contribute to fogging issues over time.
  • Use Moisture-Absorbing Products: Place moisture-absorbing bags or containers with desiccants in the car to lower interior humidity levels and actively reduce condensation potential.
  • Find and Seal Leaks: Water intrusion from a poor-fitting door seal, window moulding leaks or weather-stripping gaps introduces extra moisture. Finding and properly sealing sources prevents this excess humidity.
  • Give the Car Time to Warm Up: If you start driving right after getting in on a cold winter day, it doesn’t give the car enough time to warm up and equalise temps. Try to wait a few minutes before putting it into gear.
  • Crack Windows When Parked: Leaving front windows open just a small amount while parked allows continual airflow and stops humidity buildup inside the cabin.


Managing condensation that causes windshield and window fogging means addressing both immediate situations when visibility is impaired and prevention between drives. Paying attention to car maintenance, active moisture control, finding water leaks, and smart driving habits will all significantly reduce issues with fog accumulation on glass over the winter months.   Staying proactive gives you the best ability to see the road ahead. Moreover, if you're looking for professional help to replace your windshield, it would be best to contact AIS Windshield Experts.        

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