vaping for one month and so wise, love it!! 

I just use up all that's in the tank, syringe out any little bit that's left in the bottom that the wick can't get to.. then dry burn the wick a little bit and put the new juice in. Works with everything I've used except the really strong flavors like menthol and cinnamon. In those cases fill the tank with water and syringe it out once or twice then dry burn to get rid of the remaining water in the wick. I wouldn't get near my tank with soap. Taking the tank off is a good way to disturb the coils, and when you get them working perfectly you really don't wanna mess them up. Quartz and stainless steel tanks in the good rebuildable PVs aren't going to soak up flavors like plastic can.