It's interesting that this thread turned into a charge port failure to open discussion. This is my problem, but it's mostly one of my own making. My charge port door has been stuck twice this winter. Each time it's because the prior afternoon I washed the car at the drive-through car wash. The car is then stored overnight in my attached garage. The garage rarely goes below 40 degrees F.
After going through the car wash I open the charge port and dry off the internals. That doesn't help. Leaving the charge port door open overnight in the garage might help and it's easy to do.
The first time the door failed to open I worked at it for about 10 minutes and finally got it to release. Then, to add insult to injury (it was really cold out there in the parking garage) the little door for the charge nozzle was stuck too.
My next step will be to silicone spray the crap out of everything inside the charge port. A tether that can be pulled out to give more leverage is an interesting idea that I'll have to explore.