Hey guys, new to vaping and have been running into a little issue. I bought a Tsunami G-Class kit which is just a standard 650 battery and a 2.4 ml tank cartomizer. Everything has worked fine for the most part but sometimes the smoke becomes unusually harsh and sometimes even very very burnt tasting and extra harsh. I'm not sure what I'm doing wrong when that happens or if it has something to do with my equipment, also it seems to be harsher when the tank is less than half full or so. Any advice would be great, thanks