Actually signed up just to answer this, took the time to do so in case it helps since I searched every place I could imagine on how to fix it.
The problem stems from the small metallic sleeve around the pins. This is a free fix, and sorry for the lack of pictures just don't have the time.
UNPLUG THE CHARGER FROM THE WALL (DUH!)
Simply take a small to medium pair of Chanel-Lock pliers and GENTLY squeeze the top and bottom of the sleeve together. When I say GENTLY, I MEAN GENTLY. Just a tiny amount of pressure, stop - plug it in the wall, the phone and test. Took two times to get the correct amount of bend needed for mine.
I am a handgun, not a metalurgist...
hope that helps and I will try to stop by if anyone else has any questions