You’ve brushed off the snow, scraped off the frost and are ready to get on the road. But before you’re able to put your vehicle in drive, your windshield fogs up. Foggy car windows can happen when your car is in park or when you’re driving down the road. If your windshield fogs up, it’s not safe to drive. Here’s what you need to know.
Your windshield can fog up no matter what the temperature, whether it’s summer or in the middle of winter. In fact, cold temperatures can create the ideal conditions for foggy windshields. That’s because the car’s occupants help to warm up the cold air inside the vehicle, and when the warm moisture hits the cold glass, fog and condensation occurs.
While wiping the condensation off the window may seem like the best idea, there is something else you can do to defog your windshield fast.
The trick is to turn on your vehicle’s air conditioning! Yes, even if it’s freezing cold outside, turn on the AC!
Your car’s air conditioning system also serves as a dehumidifier, so it will remove the moisture inside the vehicle by circulating the air through the cold fins in the evaporator.
If your vehicle doesn’t have air conditioning, or it doesn’t work, turn the blower on high and open your windows a crack to allow moisture to escape.
Next time your windshield fogs up, crank up your car’s AC and make sure to aim the vents up, so the airflow hits your windshield. Your windows will defog quickly and you’ll be on your way.