Actually their are two small coils as well as a wick and material surrounding the interior by the coils which is similar to the material in a cartomizer. I have 2 coils have worked perfectly going on the 3rd month. I simply either soak it for about 1 hour in polydent and water or Everclear. I then rinse it under fresh water and let it dry from 1 hour to overnight. I rotate between the 2 for that clearomizer which I was using daily until I got my Nautilus and now when I'm not at home. The Nautilus is used at home only due to size.
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