Re: Glass Phunnel + Glass screen = crappy first experience
Your shisha was touching the screen and there is problem #1. And i think the burnt taste from the first mishap stained the remaining shisha in the bowl therefore your quick fix of just removing the touching shisha didn't work too well! I don't have either of those items but im sure someone with them will comment. Until then try to pack tight without having the shisha touch the screen!
(Oh also I think I have seen people using two coco's for that kinda setup!)