I usually wash everything out...dry the tank, base and drip with paper toweling and put in a new coil. If you have
e-liquid left in the tank just take the tip and cap off and pour back into the bottle. Clean your coil....let it soak for a few hours in Everclear, Vodka or water. If using alscohol rinse in water. Let it dry out overnite.
Good Luck to You!!!