The "fog" on a window or gauge that needs to be cleaned off (seems like an oil) is caused by the chemicals in new vinyl, carpet, seat covers, or whatever, "gassing" off. That is the same stuff that puts off the "new" car smell.
Try, if you can, inserting some of the moisture collectors that come in various pill bottles or such. They usually have some kind of silicone granual or similar to absorb moisture. When they get in a dry area, the moisture evaporates.
I started using them in underwater camera cases to keep the lenses from fogging when the water temperature would change drastically.