If you’re changing flavors, clean out your tank before you refill it.
There will most likely be about 6 holes for you to put drops into. This is called coil preparation, and preserves the life of the coil. [3] X Research source
Be careful to not get liquid into the center tube of the tank, as this is the airway. Accidentally dropping liquid here may cause you to inhale the e-liquid in its liquid form.
Clean out your tank at this point if you’re switching e-liquid flavors.
