Anybody know anything about propane torpedo heaters. On mine it will light when I press the knob in but it never wants to stay lit. I have to prop a piece of tubing against it to get it to stay lit and then it faded out over about 1/2 hour. I tried to clean the igniter and that used to take care of it but not any more. I also tried to take the regulator off an old grill and tried that and it wouldn't even light then. I'm thinking about trying a new regulator meant for a heater but figured I'd ask here before I buy something I can't take back if it doesn't work