If it is the VG that's one of the variables causing a burning "taste", does that mean the VG would actually be causing something to burn, or melt? Or just giving off a different taste, but not causing us to inhale something that's a carcinogen?
Well, my working theory has been that the combination of high voltage and low resistance makes the coil too hot too fast, causing some of the glycerine to carmalize instead of vaporizing, like burnt sugar. So, yes, giving off a bad taste, but not anything toxic or carcinogenic.
It's also a possibility that some of the silicon adhesive which holds the fiberglass airtube in place is melting due to inconsistent coil placement, resulting in some coils being too close to it. I'm considering that a serious possibility, but I'm still not 100% convinced since I haven't seen any visibly scorched or melted adhesive in the ones we reproduced the burnt taste in. And even if that is the case, I've gotten the SGS reports on the adhesive and silicon ring materials and absolutely no toxins were detected in them. So again, we're dealing with a bad taste, not a hazard.
OTOH, Cryx suggests that formaldehyde is produced from hot silicon. Except for a dry burn, the cartos should not get that hot, and even if they do, the amount produced would almost certainly be far, FAR below any hazardous level. Less than what your body produces through normal metabolism. But it may be another factor in the taste, I can't rule that out. Yet.
