Hello, first post here. I've been vaping for a month, just received a mr puffer with shifting led, and am waiting on another. This thing rocks! Worked like a charm for about a week, but now my button is not working properly. It requires that i push it very hard and straight down, any slight angle and it doesn't fire. It also will appear to be working, but atty not firing and led is faintly lit. And lastly sometimes after getting a good pull and releasing button, the led doesn't come back on. I know this happens when battery is dead, but this happens randomly. Any fix would be greatly appreciated as i can't go back to cartos on my 510, I just can't. Thanks