I used to tinker a lot with my cobs. Anymore I just figure the first two smokes or so suck. After that I'll put a little honey in the bottom or, if I'm feeling lazy, just spit in the bottom, then sprinkle some ash on top. Then, just smoke as usual except that after each bowl is spent I cover with my thumb and shake the ash before I dump for a while. The bottom builds up a cake around that shank pretty quickly and I have to trim it a little as I ream before long at all. It's not rocket surgery.I mean, that is a lot more work than I want to put into a pipe. Unless I'm just making my own pipe. To each their own