I cannot keep my amnps smoking when my propane fire is going on my GOSM. I can turn off the propane and the amnps starts pouring smoke immediately. It seems like the propane fueled flame is literally sucking all the oxygen out of the unit. I have the amnps situated on a grate about 10 or 12 inches above the fire and have an aluminum foil shield placed just above the fire to deflect the heat from the amnps. There is an open air vent on each side just above the flame and one on top about 1/2 open. Anyone with a gosm had these kind of problems? I am about to give up and just use the amnps for cold smoking. It works perfectly for that.