One other useful step is after priming and let sit, take a few unpowered draws. As you work your way up in wattage, an occasional unpowered draw is also not a bad idea. It helps draw more juice into the cotton so it's nice and saturated and less likely to end up with a wick on the dryer side. The cotton is those drop in coils is pretty compressed, so assuring juice flows all the way from the outer juice holes to the inner surface touching the coil is your primary goal. A little extra "vacuum" helps with that.