0.7 Ohm nautilus bvc coils, to be more precise. Any advice on how to use them? As in, watts or volts upper and lower, vg : pg ratio, etc, etc. Gimme the general down low, please? Also what is the difference between 1.6 Ohm and 1.8 Ohm apart from 0.2 of an ohm? I have been vaping with the 1.8 ohm coils on about 7.2 watts on isticks forever. I've just recently found the coils aren't lasting nearly as long as they used to. I used to get 3-4 weeks per coil, now I'm lucky to get a week. My istick batteries are getting pretty old, but they still work just fine. Reluctant to change, because I've bought a couple of things in the last year to test and found I got dry hits or leakage like in the bad old days. I've tried running the coils in a bit on about 6.4 watts and then increasing as the vape starts to get unsatisfying, but I don't think that is making much difference. I've always got a super long time out of my coils, but either something I'm doing has changed, or the coils aren't as good as they used to be. Too much focus on sub ohm stuff is my guess. Terrified they will phase them out!