I have a lot of flavorings I use to make my liquids. I have recently noticed some flavorings (mainly my tobaccos) are tasting off. They taste dull and have seemed to lose their bite. Some flavorings are about nine months old. I have so many I can't seem to vape them up so many are just sitting around. And I have a lot of liquids that I made long ago and when ivape them they also seem drab tasting and nowhere good as they were when first made and steeped for a couple weeks or so...not sure if my flavorings are just old or why they are tasting dull? Any info would helpful. And all my flavorings are flavour art, flavor west, signature, flavor express that I purchased online from ecigexpess. I am also adding FA vape Wizard to only my tobaccos, maybe that has gone old on me? Not sure what's the deal, maybe I've just got vapors tongue...lol. Also could it maybe be that my liquid nicotine base has got old? My base is only maybe a few months old...I buy it in 1000 mil jugs...thanks, please advise me if you can !!!