Last night I preped a picnic ham for smoking, I got up nice and early, fired up the smoker but cannot get the smoker to even reach 200F. It is a propane smoker and I have a full bottle of propane, I left it on high now for about an hour and a half and still only hovers around 175. Anybody have any ideas what might be causing this to happen? I looked at the burner and from what I can tell no part of it is blocked, propane is full, I tapped the regulator a few times with a hammer, tank is open all the way....I'm out of ideas HELP!!!!