Hey guys, I have an issue with my 92 Honda Accord. Only really humid wet days all the windows keep fogging up from the inside. Even if the car is parked with no one in it, the windows will be fogged up. In the winter, there's frost on the inside of the windshield!! I remember someone telling me this may be because of a malfunctioning heater core or something but anyone know what the problem could be and how I should go about fixing it?