hi wondering if anyone can help my 1st fix gun is in very good condition but has just ceased firing, it does fire if you leave it for a while though , but after attempting to see what the problem i bent the pin the fan is attached to and tried to straighten it but now ive snapped the pin is this replaceable ? and also what could be causing it not to fire the tongue slides easily with out sticking ,anyone got any idea,s what would cause this its nothing obvious that i can see full battery gas ect light is green indicating no faults