Hi, everyone! Thanks to the very kind encouragement of ZoiDman, I'm going to give DIY another try after spectacularly bad results the first time
. I actually have a heaping TON of TPA flavorings, but they are all a full year old (most of them never opened -- I went back to smoking, and then pre-mixed only). Are these still safe to use? Thanks, in advance, for indulging a little laziness and answering a question I'm sure you've answered before!