...the downstem. The bong is a custom ETSY piece, and (unfortunately) the downstem isn't removable. Trust me, lesson learned...next piece I get will have a removable downstem. Anyways, plugged the hole and let the SG sit and do its thing for over 24hrs, then rinsed it off with water. The bong looks GREAT, but the downstem looks like it didn't even get touched. I got some pics, they're super blurry phone pics but the main point is how dirty it is lol: Any easy ways to clean this? Only thing I can think of is some sort of extended q-tip that I can use to scrub all the shit out. What confuses me though is how the SG did an amazing job on every other inch of the bong, but the one part that needed it the most didn't change at all. So any ideas blades?? P.S. Have used iso + salt in the past, and I can say, without a doubt, that SG cleans at least 2x better. It's cheaper (because you can reuse it), way easier (no need to shake it, just pour and leave it), and it gets the shit off better. Before when I'd clean with iso + salt there would still be water lines and resin caked all around the bottom of my tube. Now it's all gone! SG FTW!