I haven't had any problems with mine. I had been using a Protank, so I had become used to the metal tips and the flavors associated from going from a plastic tipped Kanger style clearo to a metal tipped. Other than that, I'm still using my original coil head and it's been nearly a month.
Others have reported a "taste," but that usually goes away after a rinsing. Unless the wicks got burnt. After filing, I usually allow time for the juice to soak up into the wicks, so I've never had a burnt taste.
I'm sorry that you're having difficulties. Both of my iclears, the 16 and 30s, have been fantastic once you get to know them. Most clearomizers and tanks all have little "flaws," or designs that you have to get used to and cater to for the best results.