I found they do need extended soak time. When I tried the Iclear30s that came with my VTR I hated it....good vapor production but the taste was very muted...left it sitting over night and awoke to a 1/2 empty
tank. I thought it had leaked but no leakage was found...it had absorbed 1/2 the tank and hit like a dream. The coils can not be taken apart for cleaning. You can clean them by removing small silicon cap and repeatedly soaking rinsing in very hot water then doing a vodka soak. I have heard after drying out you can also dry burn before placing little cap back on but I have not tried it yet.
They are
juice hogs....I use mine for a strong DIY peppermint that is not too sweet and ran it for 3 weeks and 37
tanks before I decided to clean it just because....a dry burn did not appear to be needed. I could never afford to use this tank with my AiV juices and I have no idea how you could swap flavors...even after 3 near boiling water soaks/rinses and an overnight vodka soak the cartridge still smelled of peppermint .
I hope this helps