lanatony

Hey all, I've had the iTaste VV for a couple months and everything was great. But the last couple of weeks, I have been having problems getting good hits. I found that if I get a good hit and I don't move it - the good hits will continue. If I move it, the hits will go back to barely anything at all. Its not a coil problem or a tank problem. Can this be fixed? Or do I need a new battery?