this is what has been happening to me day in and day out for a couple weeks now. it finally dawned on me that when i started ordering all of my juices 'double flavor' i no longer got that full feeling from the vaping. i think (but don't know for sure) that there is less nicotine in the juice when more flavor liquid is added. before i started getting extra flavor, i would have to stop vaping because i would get sick of it. not now! i could go up in nic amount, but i'm hoping i will adjust. until then, i'm a vaping fool! my husband says i'm a fiend, lol.