When cold weather outside and you turn on the heater inside your car, the fog typically will start to form on the inside of your car windows.
case-1
Solution
Step - 1
turn the heat on its maximum setting because hot air can hold more moisture.
Step - 2
Then, turn the AC on, which will pull the moisture from the air as it passes over the cooling coils.
Step - 3
Finally, turn off the recirculation button so colder, dryer air is brought into the car.
Step - 4
If possible, open your windows for a couple minutes to help exchange the humid interior air for dryer outside air.
Now Your Problem is Solved
When the temperature and moisture level outside are greater than inside the car, moisture will condense on the exterior of the car glass.
case-2
Solution
Step - 1
Use your windshield wipers. This will help get rid of the condensation until you've balanced out the temperature.
Step - 2
Turn down the AC to the lowest (least-cool) setting to increase the temperature without it becoming too uncomfortable. If this doesn't work, turn the AC off completely.
Step - 3
As stated, it's a good idea to turn off your car's recirculation feature to battle foggy windows so the temperature and moisture levels in your car begin to equalize with those outside.
I Hope these tips will help you to increase your driving safety — no matter the weather.