not exactly, the darkening is caused by oxidation and not just of the nicotine, but of the other substances that are in the flavors changing (due to oxidation or other forms of decomposition and synthesis). anything that is highly refined generally will break down after a period of time and...
On exposure to ultraviolet light or various oxidizing agents, nicotine is converted to nicotine oxide, nicotinic acid (vitamin B3), and methylamine
Yay.
What have you successful used as wicking material? I've been using organic cotton balls and that's worked pretty well, just wondering if you've found something you think works better?
High VG i've found really only gets sticky for me when it's greater then say like 85% I was able to vape 80% vg in a dual coil evod glass fairly easily.
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