In my opinion, Cleaning the bowl becomes much more difficult if you let it go too long. I thoroughly clean my bowl every night i smoke. I have found that if you run very hot tap water through the bowl, it helps melt the junk off the inside and all the surfaces inside. I used alcohol and a q-tip and just scrubbed the whole outside, and then for the inside i ran hot water. I hear you can also use salt, hot water, and "Goo-Gone"- the chemical solution they sell like at every home depot or hardware store. and it will work better then magic. also, you can boil it briefly, and then use soap and scrub it, its pretty easy, you will find what works best for your bowl. But when boiling, remember glass does shatter when it goes from one temperature to another quickly, so dont take it out of the boiling hot water and then run it under cool water. it will break, no matter how thick. so if u take it out of hot water, run it under hot water, and slowly cool down the water, to allow it to adjust to the temperature. anyways, good luck! and btw i wouldnt advise smoking the resin that you gather, especially after running soap and stuff on it. its just tar and crap.