I was vaping on my subtank mini on top of a cana clone and it was working fine until the screen started glitching. It would only show like half the screen or the screen would be all jumbled up and it wouldn't fix until I turned it on and off a couple times. I took out the battery and let it sit overnight and when I popped in a new battery today the screen isn't lighting up at all, also its firing a lot weaker, and randomly locking itself. What can I do?