I regularly vape 80/15/5 (VG/H2O/alcohol base flavoring). I find that if you go below 80% VG, the juice becomes too thin and causes flooding and leaking. 80/20 and 85/15 unflavored also work well. (That is with 24mg Nicotine)
Certain tanks give me occasional flooding no matter how tight and right I have everything set, this also happens with 80% vg, so in my experience it's not so much the thickness of the juice, rather the mechanics of the tank.
The problem with high VG juices is the wicking is more critical. I vape 70/30 and 80/20 high VG juices in my Silverplay Nano, and my Kayfun Monster Mini all the time.
I recall somebody saying that when the wick (in his case cotton) is heated up it expands and allows for more efficient absorbtion. I noticed the flavour difference and the improved absorbtion after firing a few times then rejuicing.
How many times do you fire before actually vaping?
Sorry for the late reply. Rayon shrinks a bit rather than expand. I usually fire it once or twice, just to see if the vapor is coming up even from both coils, then start vaping. I don't bother firing it until dry and re-dripping or anything like that. Wick, test fire or two and straight to vaping. It's either spot on or gets there after a couple of hits.
Sorry for the late reply. Rayon shrinks a bit rather than expand. I usually fire it once or twice, just to see if the vapor is coming up even from both coils, then start vaping. I don't bother firing it until dry and re-dripping or anything like that. Wick, test fire or two and straight to vaping. It's either spot on or gets there after a couple of hits.
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