^^yeah rubbing alcohol works the best. if you just wanna do a quick clean of your bowl or pipe, you don't even need to soak it. Just dip a q-tip in the stuff and wipe away (i just did this last night)!

My step-brother and bf just made 'goo-hash' actually and it worked just fine using isopropanol...the finished product still smelt a little alcohol-y so I just left the stuff unsealed and the rest of the alcohol just evaporated.