I get the same thing with pure PG. Just stop vaping until you get pure vg :. Close the vent a bit but in any case I also find that the tanks attys are not found of pure VG Liquid I find after a few days of vaping pure VG they clog and need. Glycerol to glucose but this would still not be an issue at the levels used in vaping. My only other suggestion may be to try out some pure organic.
