I have an Ehpro kayfun clone and at first I had an issue with my nemesis being stuck to the bottom of the kayfun, I had to return it to get them to remove it. I ended up with a sentinel. I am new, so sorry if I get the name of these parts mixed up, but the base for the atomizer is stuck to the piece that covers it, not the chimney, but the larger outer piece. So when I went to rebuild the coil, it left me very little room. Is this piece not supposed to come off? Any suggestions on how I can get it off?