Ok, so I just bought a new set up a few days ago. I'm using the kanger sub nano with the istick 30w and it was amazing the first few days. Last night I was vaping on the 30w trying to take a big drag and it starts to taste like crap. I figured maybe I had burnt the coil and needed to replace it but I've replaced the coil twice with no luck. Brand new coils still burnt taste. I am priming them correctly before use. Still crap. Is it the tank or the battery? Please help, trying to stay off the cigarettes.