This may be a slight bit off topic and a bit DIY, but forgive me! However, I scrounged up some old V4L e-juice I purchased long before the "Premium" stuff came along and have been attempting to use it lately. It still has the good flavor that I like but the Vapor production was not as good as the newer product and the NIC level is more than I use now. So I've experimented with cutting it with some VG and at about 60/40 (40 being the VG) I now have some super vapor e-juice and the NIC and TH is a little milder. Combine that with the improved Premium carts and this stuff is a killer vape. So for you old timers that may have some non-premium or high NIC juice laying around... try this out.