If I were to guess based from my own usage, I would pick that the nic level is a little low. When your body gets used to the lower level you won't need to vape as much. But...you also have to consider the "habit" aspect of smoking and vape. My body told me when I had enough nicotine and I got rid of the analogs. I don't need to vape as much as I do, but part of that is my "habit" and the pleasure of the vape. 99% of my vapes are sweet to a degree, and in being that way I noticed my "sweet tooth" hasn't need fed and I've actually dropped weight. Vape is different for everyone, but same to a degree.