I also use the nano with OCC coils and do not have the same experience as you...no refinement issues and etc. I run mine at 420-430F @17 watts and only time ohm's creeps up is when the 510 center pins get a bit dirty on just one of my mods... clean the pins and all is back to normal again..... Removing an reinstalling the tank to reset is not the way to use the DNA40..or the DNA25 for that matter...
On my RDA's and when using the RBA section on the sub-tank mini, the refinements work fine.
Using the Nickel OCC coils in either the Mini or the Nano, (more so on the mini) sometimes the refinements do not work so well and the vapor is much cooler than before.
I pull the atomizer off, and then put it back on after allowing the mod and atty to get to what I think is close to the same temp.
I re-install it and select new coil to reset the baseline... I do this because the mod is NOT functioning correctly at this moment and I can tell that there is no way it is heating to 400 degrees. I believe the reason the mod is not functioning correctly is that there is a connection issue within the OCC coil itself, after all, this is the only time it has happened...
I believe that cranking up the temperature at this point is setting a temp that is simply not accurate. And since the mod is not regulating to the proper temp, I reset it to the same temp, kinda like re-booting a computer.
At this point, when it is not operating correctly, I don't care what the proper operating instructions are, the thing is not working right, period.
I saw PBusardo do exactly the same thing in his review of the DNA 40, perhaps you should go watch it and see what I am talking about.
Does it follow Evolv's instructions? No clue, it works for me, so I do it.
Over all I am very happy with my DNA 40 device, but you know what, Evolv still has some work to do before they get this right.
They are on the right track, but they are not there yet. And quite frankly, I don't care if I am not using it according to their instructions, it works for me




