I'm sure this has been discussed but couldn't find it in a search. What do you Yankees, Canadians, Norwegians, etc do about your windows in the bitter cold? Yesterday was the first day of deep cold (10 deg F) with snow/moisture that I've encountered with the Model S. I pre-heated the car for about 20 minutes, door came open with a couple of tugs but the window would not seal when the driver door was closed. I scraped all around the door frame and window edge. I also dried off all the moisture left around the frame and window but there was still a significant gap in the leading edge of the window. I made the 10 minute drive to work (fortunately a 35-40 mph drive, no high speeds), the window rattled a few times and I was nervous that some bump or jar would shatter the window. When I got to work, I futzed with it a little more, closed the door, the window sealed OK. Is the secret just to pre-heat longer? Any other tips? I'm curious if the preheating actually melts the ice, then it refreezes in the gaps, causing the problem.