How do you stop fog on car windows?

Answer

Usually it helps to heat the Windows up using the heater in the car, depending on if the air inside the car is hotter or colder then the air outside of it.

stop making out in your car!! serouly, sometimes your heater core goes out and starts fogging you windshild but does not dump water if you need to fill your antifreeze regularly it may be a heater core other wise #1 is a good an

Answer

you can make your own antifogging glass cleaner by mixing 1 part vinegar with 3 parts water and mist on glass this also helps to reduce ice build up outside vehicles it really works.

Windows will fog up if you are using recirculated air make sure you are taking in fresh air thru the vent Actually, while running the defrost, press the A/C switch. This will clear your Windows in a matter of 10-15 seconds. Rain-ex makes an anti-fogging product.