I got ONE Evod from Ftech, but it was leaky and had bad threads, so for the extra $1, I'd get "real" one's. They are like $5, and I think someone mentioned MtBakerVapor has em.
If it's that "WD40" taste that I used to get on ProTanks, the only way to get rid of it is SOAP.
I tried vodka and boiling, and still tasted metallic. But warm soapy water did the trick.
I don't think you should use rubbing alcohol...
So I'd do the soapy water thing, RINSE LIKE CRAZY, and start all over with a brand new coil/head.
You should be good then. EVOD's have a good reputation...and I like mine...
If it's a "leaking" thing, then I'd blame it on poor quality cloning, but it's got to be fixable if it's a flavor thing.