Hey. I have the same problem. Well mine does not move AT ALL actually, but the outside part is stuck in the position yours get stuck, like just beginning to pull back. I'm afraid to even go get a carwash
. I just bought this car 2 days ago and put it in the garage so I don't know if rain gets in or not... but not curious either.
Let me know if you find a solution, i'll let you know if i figure something out!