Ive noticed that when my car gets frosted over my inside is also has ice on the inside of the window screen.

I have removed any bottles of water and the such but its still doing it.

Any one else have this problem?

You must have a gap in the seal on your windscreen. So it condensates then freezes when during the night when it gets super cold!

close all vents?

Also if you look at where its at the edge, the gap could be there...

Mine was frosted up yesterday morning on the inside a little.
My theory was I had been out in it earlier and had the heater on (no ac). This warm, moist air had condensed against the now cooler windscreen (about -5 outside) and then turned to ice. Never had a dampness problem in my car.

I get this aswell. Only car i've had it happen to. T my vents are always left open, will try closing them to see if it makes a difference.

vents ok if set to recirculate (which we rarely do unless going pass smelly farm) so cold air will simply enter car through vents, worth a try might help the problem.

Cheers guys will close the vents and hopefully this will solve the problem!