Originally Posted by Steve Jr

Let me give this a shot. Humidity is usually the cause for the windshield, misting (fogging) up. The door that operates ,to bring in fresh air may be stuck. It on the passengers side under the glovebox. Access to it an the cabin air filter is thur the panel there. Have you noticed any dampness in the passenger floorboard. The filter being wet would also cause condensation, on the windshield. Now for the drains. There a 3 under the cover (cowl) where the windshield wipers are. If they are clogged, water is going to wreak havoc on a lot of vital components. At the fuel door, in the bottom left corner is the drain for that area , it runs out behind the wheel, at your foot. If you have a coupe, under the spoiler are 2 more that run out above the license plate. A small gauge ,shielded piece of wire ,run down the tubes may work to unstop them if it only leaves. A shop vac , may be used to suck or blow,( dooooon't say it) to dislodge debris. My suggestions are what I do. If you attempt this method be careful not to break the rubber used as the drain tubes.