hi, i have a istick 30 watt and i haven't been doing anything different with it but now it randomly stopped firing with a error warning popping up on the screen reading '' atomizer short'' the pin looks ok and i also tried different atomizers on it but the error wont go away , anyone have any ideas on how to fix it? my bf knows a lot about ecigs and is pretty good handy wise with them but if anyone can think of what the problem could be to help him spot what the problem might be please comment below.