I'm finding with VG's and VG blends if I fill my T2 or Mini Nova only to 1.4ml and burn it all the way down then pull the coil and sop up the wicks with a paper towel and simply rinse the rest and refill another 1.4ml that this works well. Even a flavor change doing it this way is no big deal. You get a handful of hits that are tweeners but the new flavor takes over before long. Yes, if it is a profound flavor change then you got to thoroughly clean the atty. But if you dedicate a clearo for each flavor, this will simplify the process. I suspect a thorough cleaning of the coil with a dry burn would be in order every so often.