Your lucky they are Roor parts or you likely would have broken them in an atempt to seperate them, I once had a stem stuck in a bong, I used non toxic kitchen lube that I got from the gas station that I used to work at, it worked like a charm, the trick is getting the lube in between the two parts, which I can see is your problem. I cant think of anything else other than trying to put some pressure on it to loosen it up, just be careful it being glass and all!
Good Luck
KiEfBoyjBm Reviewed by KiEfBoyjBm on . glass on glass bowl and stem are stuck i have a roor with the stem and then a seperate bowl piece, glass on glass. i keep the bowl in the stem and keep them in a sock for storage. i was dropping it out of the sock the other day and it missed my hand and hit the ground. it landed on the top of the bowl, wedging the bowl into the stem. it is stuck and i cant turn the bowl or pull it out. any ideas on how to seperate them? Rating: 5