Clean a bong by filling the chamber with 91% isopropyl alcohol and coarse salt, sealing the openings, shaking for 60 seconds, then rinsing with hot water until no residue remains. Heavy resin takes a 10 to 15 minute soak before the second shake. The whole job takes about 15 minutes and needs no specialty cleaning products.

How to Clean a Bong With Vinegar and Baking Soda

What You Need

Step-by-Step Instructions

  1. Empty the old water into a sink or toilet and dump any ash from the bowl.
  2. Pull out the bowl, downstem, and any removable accessories.
  3. Rinse the main chamber with hot water to loosen surface grime.
  4. Pour 2 to 4 tablespoons of coarse salt into the chamber.
  5. Add 91% isopropyl alcohol until the liquid covers the salt and reaches the resin line.
  6. Plug the mouthpiece and the downstem opening with stoppers or your palms.
  7. Shake the bong firmly for 60 seconds so the salt scrubs the glass walls.
  8. Let it sit for 10 to 15 minutes if the resin is thick and dark.
  9. Shake again for another 30 seconds.
  10. Pour the alcohol and salt mixture into a sealed container for disposal. Do not pour it down a drain if you can avoid it.
  11. Rinse the chamber with hot water until the glass runs clear and no grit remains.
  12. Repeat the salt and alcohol cycle once more if you still see brown film.
  13. Air dry the bong upside down on a clean towel.

Cleaning the Bowl and Downstem

Small parts are easier to clean inside a zip-top bag. Drop the bowl and downstem in, add a tablespoon of salt and enough alcohol to cover them, seal the bag, and shake for 30 seconds. Let the bag sit for 5 minutes, then scrub the bowl screen area with a pipe cleaner. Rinse under hot water and check the downstem hole for leftover resin blockages.

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Cleaning Percolators

Percolator bongs trap resin in narrow slits that salt cannot always reach. Fill the percolator section with alcohol only, let it soak for 20 minutes, then flush it with hot water. Repeat until water flows through the slits with no restriction. Never use rice or abrasive beads in a percolator, since they can crack thin glass.

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How Often to Clean

Change the water after every session and do a full alcohol clean every 3 to 7 days for daily users. Bongs used less often can go 2 to 3 weeks between deep cleans. A bong with visible brown coating, stale smell, or slow draw is overdue.

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Safety Notes

Quick Fix for Light Buildup

For a bong that just tastes stale, add hot water and a few drops of dish soap, shake for 30 seconds, and rinse twice. This handles waterline film but will not remove baked-on resin. Save the salt and alcohol method for a full reset.