I know there are many posts on burnt taste, and most people are saying its from the tank not having enough juice. I didn't have this problem until I upped the Nicotine level in my juice. My juice is a dark 70/30 mix and if I hit more than at least 2-3 minutes between then I am tasting burnt. I used the 30mg nicotine before, and upped it to 36mg on this bottle. I love the taste of this juice, and am having lots of trouble finding anything local that relates to the taste. I have tried many different tanks, and got a different result from each one. CE4 and 5 - clogged after 2 hours. EVOD - got three and all of them tasted like metallic air after a few hours. Maybe the coils bad? Got a T3S and it was awesome, used it 2 days (Longer than any other) and after about 6 tanks, liquid got really black and tasted burnt every hit. Cleaned it really good, let it dry, and first hit was fine, second hit and any there after was burnt. Could it maybe have had the bad liquid too long and either burnt the coil and wicks? Now I have the Mini Protank 3 and have been getting burnt hits again if I hit more often than every 2-3 minutes. Would one of the adjustable airflow "add-ons" make me get more air, and more liquid to my wicks and help not get the burnt taste every time?