I know these might be silly questions, but I was wondering what is the resin? Is it the black stuff that sticks to the sides of the bowl? And how do you clean the bowl? And what do you do with the resin? I know you're supposed to smoke it, but I guess I just don't understand. Also, how often do you clean a bowl? And if pot gets sucked into the inside, what is the best method of getting it out? I've had my bowl for over a month now and I haven't cleaned it yet because I don't know what I'm supposed to do, and I am too embarrassed to ask any of my stoner friends! Thanks!