Try washing the cart with everclear.Put some in a syringe and pushed it thru my XL when I used some bad juice in it. Blew it out good and let it dry fir a few. Did a dry burn to clean it and voila clean no bad taste.I opened up a new KR8. I have not *quite* worked out the foul taste yet, and therein lies the rub. I'll have more to say about this one in a later post.
Just a thot
What in the world is overwicking?