Baditude is actually another of my forum rock stars, to be sure! I got an IBtank and a slap-yo'-mama tool for it, based on his word alone.
I'm starting to fear that it's some flavoring additive that I'm sensitive to because spicy-tongue goes away only with my vg unflavored nic base. I was hoping that, just maybe, some others had experienced such a phenomenon and found certain flavored juices that didn't cause it. As I type this, though, I'm thinking maybe one of those ridiculously long drip tips might be in order to reduce the frequency of juice on the tongue. If people aren't jumping in, then perhaps this isn't a known issue (as I'd sort of hoped it might be, for tips)
My personal thoughts are you might be getting juice (in particular nicotine or a flavor agent) on the tongue. It also could be a sensitivity to Pg. The only way to distinguish if it is one or the other is by a process of elimination. Either switch to all vg liquid or get a longer tip.
I've gone to pretty much using vendors that use all vg, not because of issues with pg but I prefer all-natural, all-organic flavoring based on flavor I have gotten from these. Virgin Vapors, Vaperite, and Dripeez carry these. They offer custom mixes to choose pg/vg ratios of you choosing, but they seem to hint that they recommend an all-vg mixture for their juices.
You can go another direction and get a longer drip tip. The longer the mouthpiece the more likely any liquid will get caught up within the length of tube. There are also styles that alter the airflow to the mouth, effectively blocking off any liquid. A longer tip may noticeably cool the vapor somewhat.
Longer Drip Tips:
RTD Vapor - Not much longer than a typical ming style or Cherry Vape tip, the Knuckle Head helps keep juice out of the mouth because of the bend in its design. Juice tends to get blocked at the elbow joint. I have a couple, and because of the bend, tip shape and being inexpensive, they among my favorite tips. $6. -
Drip Tips
Also available onsite are the infamous Trippy Tips. The ones you would be interested in with these would be the "doughnuts", which have a double barrel shape that meets at the top into a normal outlet. These are said to be great for drippers who use them to keep juice from getting into their mouth. Pricey at $40 and up, but they ARE beautiful and one of a kind. If interested in these, I have links to many more vendors that carry these:
Trippy Tips
Super T Manufacturing - the Tanbur is a long stainless steel tip; I've read that people who use them consider them their favorite tips. I tend to see these on the higher end APV's like the GG's. About $20.
Super T Manufacturing, Innovative manufacturer of electronic cigarette products.
Drip Tip Designers - Designer drip tips also on the pricey side; they have some long slim brass tips. $25.
Drip Tip Designz - Drip Tip Designz
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I'm certain that I've left out some, but that's a nice start point. I personally don't care for metal drip tips, I don't care for the feel of metal on my lips or teeth, but that's just me.
Also, thanks for the accolades.