Hi all. I have a Heatvape Invader Mini with a UWell Crown tank. It has worked fine for a few months but now, every time I hit the fire button, the wattage drops from 36 to below 10. It's infuriating and I can't find any information on the web about it. I've tried emailing Heatvape support with no reply, and asking around. Can anyone help me? Thanks for reading.