I got a multimeter a few days ago. Out of curiosity, I tested the resistance of some cartomizers and atomizer heads I have. I've been monitoring the 2.4Ω Vivi Nova head I've been using for a a week or so. When I first tested it, it was around 2.6Ω. Now it's around 2.8Ω. It's still vaping excellently, but it leaves me wondering.. Does darker juice raise the resistance of the coil faster and what are some other things that raise the resistance of the coil ? I clean it regularly and dry burn mildly 'til it doesn't smoke anymore. When I say mildly, I mean I take my time with it. 4 seconds on. 4 seconds off. I don't keep the coil orange hot for 10 - 20 seconds like some people suggest.