RamblingSid replied on 10/10/2014 17:17
Posted on 10/10/2014 17:17
...seems to be that wind pressure during towing can force the outer skin to touch the inner skin and damage both of them. Ours developed a small patch that looks a bit like condensation, but it is inside and on both surfaces. The dealer took one look and said he would order a replacement. The outer skin does seem, on pressing, to be much more flexible than any of the other windows.
RamblingSid
Motorhomer