Did you grease the shit out of it? Mine's the same. In fact I quit using my drivers side since the cold weather started months ago. The warmer it is, the better it seems to work. I thought maybe the motor was dying since I use it all the time. Perhaps the grease is wore out/broke down, and with the colder weather, it might be thickening up. I don't know, hopefully you can figure yours out so I'll know what to do to mine. Mine will go down, but hell if I'll trust it to go back up, so I leave it up.