don't know if this is a common way for these devices to fail, but thought I should mention it..about 2 weeks ago I was vaping in my house..took a puff off the vamo and set it down..the damn thing stayed on..I quickly unscrewed the tube and took the battery out..tried it again and as soon as I turned the device on it would fire constantly..hopefully mine is an isolated case, but would like to put word out that this is a possible failure for the vamo and not a very safe way to fail lol..