Take it apart, take the o-rings off.. wash everything with dish soap/washing up liquid. Rinse well. You can take it a step further and dip the parts in cheap vodka as the last step if you want, helps if you have very smelly dish soap. Make sure to take your drip tip off your top cap and wash those two pieces as well. I like the taste of Pluid and don't find it bad mixed with other juices so I just sploodge my other juice right in, but it's very helpful to remove any lingering oily flavors like the anise and cinnamon. I do it if I switch from a strong tobacco to a fruit flavor as I don't like that combination much, I prefer tobacco flavors with caramels and creams and my fruity vapes unadulterated or spicy.
Usually you don't have to do that full cleaning though.. I just run it dry and add the new or at most put cheap vodka in the tank (with the wick/coil still installed) swish it around a bit and syringe it out. Burn it til the wick is dry and it's good to go. Oh, ans wash the top cap and drip tip.. you'd be amazed at how much of the flavor is actually lingering there.
Thanks Fisty! I'm gonna go fill that tank now! Bbl!