Sorry to be gross but I've been using my PV since last Sat. (but still smoking analogs too, explained below) and starting a few hours after first few uses I noticed this slimy feeling in the back of my mouth and throat, like it was covered with corn syrup or something? Then in the mornning I had a disgusting phlegmy cough. Same thing next day. I cut way back on the PV a couple of days to see if it got better as I was fine before I started. It did. Then experimented again: The slime buildup only happens after vaping but it seems to be happening actually more than at the start, and so now I'm only vaping 1-2 times a day but it's getting worse and I've got one of those catchy coughs that keep on and on. This has got to be the PG, right? Is VG better? Does it come in prefilled cartomizers? Thanks -- I actually really really like vaping and I want it to work for me but I can't deal with this slime aspect.