Sometimes TP wont charge? How to fix?

[GRB]

I've also started having this problem, but the strange thing is some chargers work while others don't.
My stock wall charger and Sprint brand car charger do not work, but my USB PC cable and 3rd party docking station both work fine.

I've yet to try the power off trick, but will once I get home (or in the car) and see if that works.

FYI, stock ROM

I even took my phone and chargers into the Sprint store the other day to see if they had a solution.
The same results occured there. My chargers would charge one of there phones but not mine.