It will dissipate after awhile. I get it from Virginia tobaccos and a couple of Orientals like Cypriot or Macedonian. I don't know what causes the scent but I tried to track it down some time ago and after adding nic, VG separately I got it from the VG.
However, someone posted an answer back then, to a post I made about it, that it was probably the nicotine. I have always used Wizard Labs nicotine. The one time they were out was when they moved and I had to get nicotine from Ecig Express. That nic was a lot darker and I definitely got that scent from it.
So, I don't know which it is. Perhaps someone else will post about it. In the meantime, it has always gone away after steeping so I don't worry about it.