I got the stuff (TH plus) from vapor pro... I tried it. It seems to work ok when I dumped the entire 6ml bottle into about 20ml of 50/50 pg/vg 36mg "totally wicked" liquid (also from vapor pro). This still didn't give me my desired TH (in ego-t mega BTW) but I have since come to the conclusion that this is because I need a LR atty, and not because there's anything I should add to my liquid. HOWEVER: on that note, I am almost positive that "TH plus" is ethyl alcohol.( If it is, it would be cheaper to get one of those airline size bottles of everclear and use that to increase TH. And you can buy that at the liqour store without paying for shipping, haha!) It smells like everclear, but because I wasn't sure, I didn't taste it to see, I just smelled it from the bottle. I didn't think much about it at first, but when the bottle was empty, I got curious and started searching the forums. What I have learned about the ethyl alcohol content of most pg/vg liquids has led me to decide to try putting alcohol based vanilla extract into my vanilla e-liquid to increase both TH and flavour. I'll let you know how it works, if it does. And if anyone knows that this is BAD idea, let me know before I die of vanilla extract poisoning, lol!