Quote Originally Posted by sickity
If it is glass the best thing to use is acetone, and if you don't have any or don't want to buy any then take your gf/wife/mom nail polish remover as it is virtually the same thing, works better then alcohol and don't worry it is highly volatile so you won't be smoking it, trust me it cleaned almost anything stuck inside a beaker/flask when I was taking organic chemistry....
Actually you dont want to use Acetone on your glass pipes because it can remove the fuming from the inside of your glass pieces.And who wants to smell that crap.we use that shit at work to clean parts with after machining them,no damn way I wanna use that crap at home.Harsh chemicals may take less time,but do the job right right with the proper stuff.:thumbsup::jointsmile: