I'm using an eGo-V V2 Mega, I've been using it for maybe 3-4 months without a problem, and it seems it's developing some kind of loose connection with the firing button. It'll randomly fire on and off while I'm vaping and sometimes it'll even turn off completely having been "pressed" 5 times in succession. Is there anything I could do to fix the loose connection myself or is it time to buy a new battery?