I've got enough tanks to be able to keep my juices going, but if I ever want to change, then I just strip them down wash each part under running hot water, dry the inside of the tank, the top and base with a towel, then I leave them to dry completely on a paper towel on my desk for about an hour, before assembling them again, a quick dry burn (i usually just give the power button 5 short presses), then fill 'em up, another couple of quick power presses to get the liquid soaking into the coil and ready to go.