condensation on my cars back window??

Wig

You mean the rear mirror.

If your main carpets are damp it might indicate a leak somewhere like doors or sunroof, and if it were me I'd remove them aswell (which might mean removing the seats).

shellsuit

I get this in my car quite a lot.

And guess what.....i have a slight leak in my boot. It was leaking in through the area around my rear light clusters so i used silicone sealant to seal it up. It was the ready made stuff in the spray can and worked a treat to stop the leak. It used to condense up a lot worse than it does now so it's just a case of searching in the boot for gaps around aerial mast e.t.c. to get rid completley

If your car is a few years old like mine then it is possible the seal around the rear window is starting to go or the rubbers around it are starting to perish slightly.

Autoglass or another company like this should be able to re-seal the window for a small fee if it really annoys you or use and adhesive around the rubber seal to fill in any gaps.

There are various problems for various cars why lead to rear windows steaming up in the way you describe. I'd have a look to see if there is a forum for your make and model of car and have a look to see if it is a common problem and how to sort it out.

tomstickland

Yes, water leaks anywhere will cause this.