I can't really pin down the flavor, it's kind of metallic, and sometimes it can get pretty harsh. It comes on and off, but regardless it tastes awful. At first I thought maybe it was the cotton, because it tastes a bit like chems, but it hasn't gone away! From what I've read, I thought maybe it is because I never cleaned it, at all. So my question is, has anyone else had this problem? How'd you fix it? Thanks in advance! 