Received my 901 and love it, but the problem I'm having is with my e-liquid. First batch was PG made me cough till I gagged and felt like I was running a fever. I switched to VG and it caused mouth blisters the first day. I have just ordered PG/VG 70/30 hoping this will be the one that works. Its getting frustrating to the point of giving up, but I truely want this to work it self out. Any suggestions for a newbie?