Hi, can anyone help? I'm using the hand torch from Cookson's starter soldering kit, it has been fine but has now turned into a mini flame thrower, exciting but not good for soldering! I thought I'd just over-gassed it, but I've let it run for a good long time and it's not settling down. Is this likely to be something affecting the jet and if it is how do I fix it?

Many thanks in advance for any answers!