My Volt is parked outside overnight. I live in Ottawa, Canada, where we are subject to sub zero Celsius temperatures and snow. Does anyone have a solution for the charging port door freezing shut. Not very convenient when trying to plug in at the end of the day, especially if it is dark. The mechanism still appears to operate as I can hear it, but the door will not open. I have had to pry it open while pushing the button on the key fob. Something I am not comfortable doing as I feel I may end up breaking the door off.