I read somewhere about this problem, but never saw a fix. I began having this problem and after watching my ego burn uncontrollably a few times I messed with the button and realized if it gets turned a little it will start doing this. To fix just look at the button. There are 2 sides that stick up a little more from the center of the button. Looking at the cig in your mouth, those sides need to be even on the left and right sides. If it is slightly skewed it will get stuck. To fix just twist it back into position. Anyways, great battery life from this unit 
