Unless you all know this already, I think this may actually be new idea and technique.

1. Ensure a perfectly clean bong stem.
2. Cut parchment/baking paper into a rectangle, l = stem length, w = stem circumference (plus a wee bit)
3. Roll up, insert into stem, use water to ensure it sticks flat and covers entire inside surface.
4. Use bong as per packet directions.
5. To achieve victory, remove paper lining, observe your perfectly clean stem.
6. Replace paper before continuing.

Change your water, change your stem lining and enjoy a totally clean smoking experience, every time.

All you have to do is cut out some paper rectangles. So it’ll be tough. Persevere.

(It’s been a decade since I spent a decade getting baked everyday, so I’m sorry if this is already a thing for y’all)