Finally got my Njoy Npro to work..and it did for 3 days. Now every time I take a drag it blinks. I know it's suppose to do that if you take too many "hits" in a short period of time but after the first drag? I take a puff...blink,blink,blink wait a few minutes take a puff, same thing. I read that these things have a "on,off " switch.. is mine stuck, will throwing it across the room help?