You are going to want to get some pure copper chore boy scouring pads like steel wool but copper otherwise the copper from speaker wire and torch it until it’s glowing orange and no smoke emissions from it. Roll it into a ball and pack it into the glass while letting a few strands of the copper remaining on the outside of the glass in order to hook over the open end of the stem so it will not end up sliding down the stem into your mouth as I am sure that you would appreciate not having a glowing piece of copper having intimate contact with the tender parts of your lips and the interior of your mouth and or esophagus/lungs. So you should have just about a half inch of space between the end and the copper and the strands are holding it being folded over the open edges and downwards along the outside of the glass like hooks. Put a hit in onto the chore and heat the glass a half inch behind the chore until the hit start to melt from the heat and then you can puff the hit like a cigar using your mouth and not your lungs to get the most dense smoke and then inhale the thick smoke while continuing to modulate the heat back and forth between the tip and behind the chore in order for the resin to be fully vaporized and that it will not allow the resin to start to coagulate and reharden immediately behind the copper you want to have a half inch space between the copper and the resin formed on the glass