I pull the atomizer head out of the ring that threads onto the battery for cleaning, but I never bother pulling the post off to expose the wicks and coil. Just run the three pieces of the Evod under hot water, wipe out most moisture with a pipe cleaner or paper towel, dab the wicks with paper towel to dry as much as possible, let it sit for a couple hours and reassemble. Just make sure to let the juice sit in the tank for a few minutes to soak into the wicks, and you still might get a couple slightly dry hits starting off fresh.
I do this every 4-5 tanks pretty regularly, but I normally don't worry about it between every juice change - like others have said I have Evods that I use for dark flavors like coffee and tobacco and wouldn't mind if they overlapped a bit, and others for fruity flavors that also mix well.