If the mod has been properly cleaned, your battery is charged...it's almost gotta be the build. I wrap with 28 guage wire and get massive vapor production , even with my higher wraps at 1.4 ohms. In my drippers I wrap between 0.7 - 0.9 sub-ohm, for Kayfuns/Prometheous/Krakens between 1.1 and 1.4 ohms. I get excellent vapor production with 28 Guage kanthal. So I doubt that's the problem, I'd wrap another coil and try it again. Though VG is supposed to give better vapor production, I have several 70/40pg-vg and 60/40pg-vg that give up more than enough vapor. Good luck.