I have been cleaning some rbas that I have been meaning to do for a while now. When I took the Tobecco Kayfun lite clone apart it shocked me. The coil and cotton were jet black as if I had been vaping oil! Now it has been sitting there for about 2 weeks, very lazy of me I know. I know I was only vaping a renowned Aussie vendors doubler in it for about 2 weeks. I would rather not name the vendor in case of causing offence. In as much to say the juice is not at fault, Im sure and it was not a net.This one wasnt for me but each to their own as the saying goes . I have also being using it in other Clearos so I am positive it's not the juice. Could this be down to my laziness in leaving it for too long before cleaning it? Was wondering if anyone else has had this problem and can offer an explanation. Thanks.