
Graeme, Gearboy's right there's probably a bit of debris blocking the jet. I've just stripped mine to have a look. If you unscrew the burner head anticlockwise, the stove will separate into bits (while it's in bits you can stretch the spring a bit to make the stove a bit less wobbly). You'll be left with the hose attached to the a small brass part with the jet clearly visible on top. The jet can be unscrewed with a spanner, but you might get away with opening the control valve and blowing from that end of the pipe ie putting your mouth over the place that the gas cylinder screws to. Failing that, unscrew the jet and blow through it. I would advise against pushing wire through it to clear it as this can enlarge the hole. Not sure of the consequences of this, I've just heard that it's a bad idea or maybe I'm getting mixed up with cleaning the jet in a carburettor.