It literally was working fine all last night and for like an hour this morning. I ate my breakfast and when I went to take a hit, nothing. Put a new battery in and the screen comes on, clear as day one, and when I hit the fire button, i got nothing. Holding it in even - the screen just times out like normal. I have over 12k hits on this without an issue. When I go to press the menu buttons, it either locks the device or it auto fires. The mod has never gotten wet, nor has there been any juice interaction.