Hi there!
I'm a noob. Like, really, a noob; I've only been doing this for a week.
I ordered three CE4s from Apollo to go with my TGo, and after only a few days, two of them were dead. Apollo, being the awesome company that they are, told me that they're sending me two replacements.
Anyhoo, I figured since I had the support dude on chat, I'd ask about care and feeding for clearos, and he told me that you don't wash them at all. I asked him how to get the taste out, and he said to put the new flavor in, and after a few hits, the old flavor would be replaced.
This was after I'd followed other advice that I found online and soaked them in vodka and swabbed them out with a Q-Tip. I don't know if that's what killed them, because everything I've read says they should be washed, but I don't plan to do that anymore. I figure I'll segregate the clearos - one for spicy flavors, one for fruity flavors, etc. Maybe that'll keep the pollution to a minimum.
So, that's what I heard, straight from the manufacturer.
Have a foggy day!