Air can solve a certain amount of water. The warmer the air, the more water it can solve; the colder, the less. If the window's glass gets cold, it will also cool the air that is directly around it, so that air will be able to solve less water. If the air gets too cold and the amount of water it can solve drops below how much water is already solved, then the excess water will condensate on the glass, fogging it up. That's also why heating the glass will cause the fog to disappear. As it gets warmer, the air will be able to solve the water again and so it will.
well it could be because of the heat. if its cold out and you have the heat on in the car, then you will get hot and that will cause the window to fog.
heater core is going bad.
When the windows begin to fog, the physical change is: condensation of water vapor.
moisture from your breathing for example condensing on the cold glass
check owners manual i think its a bad design in which this model requires the a/c to be on at all times that the defroster/defogger is on, otherwise the windows will fog up this is horrible while its rain during warm weather
It is called condensation, warm and humid inside, cooler outside.
Two people, breathing heavily. There's a lot of water vapor in your breath, and when two people are going at it they breathe a lot more causing more water. If it's cold outside, the windows fog up like crazy.
If the heater core is ok, check to insure your ac unit is working. The ac works in conjunction with the heat when running defrost, and without the ac air windows will fog up .
The moisture in the air caused the windows to fog up.
Ive only once had a problem with foggy windows, but I was told to wash the interior windows with winter windshield washer and they will never fog up or freeze.
Windows fog because the glass is cold and the humidity is high inside the car. It has nothing to do with the age of the car. Try turning the fan up to circulate the air better, and if that doesn't work, turn the AC on -- but turn the heat up so it doesn't get cold. That will do it for sure.
Turn the conditioner when you are using the heater. It will decrease the humidity level (which causes windows to fog up.)