So, this isn't mine, but here's a pic to give for elaboration: http://www.grasscity.co.uk/img/products/glass_spoon_pipe_clear_bead_f.jpg So at the bottom of the bowl area, some black crap gets stuck at the bottom after a while. I cleaned my pipe THREE times thoroughly with Isopropyl alcohol, and go the job done except for that stuff at the bottom. I can't unscrew it or anything, the only way to reach it is through the main hole or choke. Anybody have any ideas? It's not a big deal, I'd just like my pipe to look cleaner.