must there be sumthing wrong sumwhere coz i havnt changed the dwell since i baught it ???
its set to 16.0 (how it came) *ive been using it with the setting for a while and its worked up and till now*
sounds like it is being starved of air somewhere, what reg do you have on the bottle, also try turning the on/off knob out a turn.
did you try a fresh battery, that could poss cause problems