Hey there everyone, I'm new to this forum but have been vaping a little under a year. Back in December I bought my first real set up, an XCUBE Ultra mod with a TFV8 tank. Everything has been great with it, but all of a sudden it has just stopped working. Everything turns on, and my mod reads that there is a tank and coil attached, but when I try to fire the seconds go up but there is no heat/smoke being created. I've tried turning it on and off, changing batteries, thoroughly cleaning the connection points, and replacing coils but nothing has seemed to work. Is it probably my TFV8 has gone bad and I need to buy a new one (cheap option) or has my mod gone bad and I will probably need to find a replacement? Any ideas, tips, or tricks are appreciated and thanks beforehand!