Door Latch problems of the 2006 Saturn ION

In below freezing weather, our 2006 Saturn 4-door Ion is extremely difficult to get into when everything freezes. This might not be abnormal except that the plastic tread on the door frame at the bottom on most of my doors now have shattered and broken off due to this. Also, the back door windows roll down by themselves a little in any temperature. And today (again in freezing weather), my driver's side front door would not close. The latch wasn't catching. I called Saturn and they said there was no fix for it, and you had to spray it with wd40. I've never had to do this with any other vehicle and never have I seen this happen before. As it was, the wd40 worked. The number of failures for the door is 2 (last night, and this morning). The number for the door tread is 4 (all 4 doors). The number of failures for the window are far too numerous to count, so I've put in there 100 because I've had it over a year and it does it constantly.

Defects with his 2006 Saturn Ion. The vehicle was taken to the dealer for a malfunctioning passenger seat belt, there was a problem with the driver side door and a noise coming from the alternator/generator.