Here's an annoying problem i have. whenever i'm driving at night my windows completely fog over to the point where it becomes difficult to see anything anymore. i've tried running the ac, de-foggers, windows open, everything in every combination and nothing seems to work. how do you all get rid of fog??

Is your defogger putting out warm air? I cannot see if it is working why this would be happening. Curious to see if anyone else has had the same problem and what it was?

I had a similar problem soon after I got my present car, I was convinced I had all the settings correct and I couldn't make sense of it. I decided to read the manual one more time before taking it to the dealer to find the fault. It turned out that I had made one small error in the settings. If you are certain that you have followed the instructions in the manual and it is still fogging you need to get your mechanic to look at it because it must have a fault somewhere in the system.

If the car is new & you're convinced you're controlling it right then you may have a problem with the AC. If it's an older car, have you developed a leak somewhere?

One main problem for your problem is the result of a leaking heater core.The coolant in the system converts into steam as it escapes the heater core.The same
problem may be with the radiator. so get it checked where the actual problem lies.