I am just about to buy the evod starter kit, had previously used eroll but it just isn't cutting it. The atomizors are expensive and tanks to weenie and too finicky to clean and both too expensive to replace. I still don't understand the terms. The evod says bottom coil replacements. I get this, after a week or two or whenever the burnt taste or craving hits it's time to replace the bottom coil but is the clearomizor the part where you put the juice in? I get confused because I thought this was a "tank." Is a tank also called a clearomizer? And do they have to be replaced like the bottom coils? Or can they be washed and re-used? Thanks.