I have been vaping for 10 months and every clearomizer I try including the Vivi nova tastes burnt to me even at 3.2 volts on an ego batt. My best friend can try the same thing and it tastes fine to her. I am betting that the last thing that worked out for you was a cartomizer. I use 3 ohm cartomizers on a VV device. Try that out. LR stuff will burn at even a slightly high voltage for me but 3.0 does good up to about 5.5 volts. You can try a few cartomizers for pretty cheap. I hope this helps. I had a lot of trouble in the beginning too.