I just tried my first cartomizer, I filled it and about gagged on the first drag. It taste awful, like oil or something. I also notice I get very little vapor, I put it down for a few days and tryed it again and it still taste like gun oil smells. I think its a boge carto, I switched back to a standard cart and I get great taste and vapor. Could it be my standard 510 battery and atty are not powerful enough?