A dirty bong tastes bad, pulls harder, and smells up the room. The fix is cheap and takes about 10 minutes of actual work: isopropyl alcohol, coarse salt, and hot water. Here's exactly how to do it, how to handle percolators, and how often you should be cleaning so it never gets that bad again.
Shop our easy clean bongs if you're done fighting with yours.
What You Need
- Isopropyl alcohol, 91% or higher. The 70% stuff works, just slower.
- Coarse salt. Kosher or rock salt. It does the scrubbing.
- Two zip-top bags. One for the bowl, one for the downstem.
- Hot tap water. For rinsing.
- Pipe cleaners or cotton swabs. For the tight spots.
- Optional: silicone caps or plugs, so you don't have to cover the holes with your hands.
Skip dish soap (it's hard to rinse out and you'll taste it) and skip boiling water (it can crack glass). Store-bought bong cleaners work, but most are basically iso with extras added at three times the price.
How to Clean a Bong, Step by Step
1. Take it apart and dump the water
Pull the bowl and downstem, and pour out the old water. If your bong comes apart, take off every piece you can. The more you separate, the more surfaces you can actually reach.
2. Rinse everything with hot water
Run hot tap water through the chamber, downstem, and bowl. This knocks loose ash and fresh resin so the alcohol has less work to do.
3. Soak the bowl and downstem
Put the bowl in one bag and the downstem in the other. Cover each with iso and add a tablespoon of coarse salt. Seal them and let them soak for 30 minutes, or an hour if they're really caked. Then shake each bag hard for a minute.
4. Clean the chamber
Pour in enough iso to coat the walls when you tilt it (an inch or two is plenty) plus a couple of tablespoons of salt. Cover the mouthpiece and the downstem hole, and shake. Let it sit a few minutes, then shake again. Heavy buildup might need a second round with fresh alcohol.
5. Hit the tight spots
Dip a pipe cleaner or cotton swab in iso and work it through the joint, the inside of the downstem, the mouthpiece, and the bowl hole.
6. Rinse until the smell is gone
Rinse every piece with hot water until you can't smell alcohol anymore.
7. Let it dry completely
Let everything air dry before you put it back together. Trapped moisture is how bongs get musty.
How to Clean a Bong Bowl
The bowl gets dirty fastest, since it touches fire every single time.
- Knock out old ash and clear the hole with a poker.
- Bag it with iso and a teaspoon of coarse salt.
- Soak 30 to 60 minutes, then shake.
- Finish with a pipe cleaner and rinse with hot water.
If you use a stainless steel bowl piece, it cleans up even faster. Metal doesn't hold onto resin the way a crusty glass bowl does, and you don't have to baby it.
How to Clean a Percolator Bong
Percolators are where cleaning gets annoying. They're built to trap smoke, and they trap resin just as well. You can't scrub them directly, so it's all soaking and shaking.
- Fill the bong with iso until every perc is covered. Yes, that's a lot more alcohol than usual.
- Add plenty of coarse salt.
- Cap every opening and let it soak for 2 to 3 hours.
- Shake, swirl, and tilt it so the salt moves through each chamber.
- Dump, rinse with hot water, and repeat if you can still see buildup.
Tip: once it's clean, run warm water through it after every session. A perc that gets rinsed daily almost never needs the full treatment.
How Often Should You Clean Your Bong?
- Every session: change the water. Ten seconds. This is the single biggest thing you can do.
- Daily smokers: full clean once a week.
- A few times a week: full clean every two weeks.
- Occasional use: clean it when it starts looking or tasting off, and always before it gets put away for a while.
Clean right away if the water turns cloudy, the glass looks yellow or brown, or it smells musty. Fresh resin comes off in one soak. Old resin takes several rounds. Small effort every week beats a gross two-hour project once a month.
How to Clean a Bong Without Alcohol
- Hot vinegar and coarse salt. Works, but plan on a longer soak (an hour or more). Our vinegar cleaning guide has the details.
- Hot water only. Fine for a quick rinse after each session. It won't touch old buildup.
- Denture tablets. Drop a couple in warm water and let it fizz overnight. Not magic, but it helps loosen stains.
Why the Design of Your Bong Matters
A traditional one-piece bong is a sealed glass container. You pour stuff in, shake it, and hope it reaches everything. Add percolators and there are even more spots you'll never touch.
We got tired of that, which is why the Capsule Water Pipe comes completely apart. Chamber, mouthpiece, downstem, and bowl all separate, so you clean each piece in your hands instead of shaking blind. Here's the quick version for a Capsule:
- Take off the mouthpiece and clean it on its own.
- Pour salt and iso into the downstem and chamber.
- Seal it with the silicone base cap.
- Shake, let it sit, shake again.
- Rinse with water and let it dry.
Here's a short video of the whole process.
FAQ
Can dirty bong water make you sick?
It can. Stagnant water grows bacteria and mold, and you're pulling air straight through it. Change it every session.
What's the best salt for cleaning a bong?
Coarse kosher salt or rock salt. Bigger grains scrub better. Table salt dissolves too fast and Epsom salt is softer, so both do less work.
Can I use 70% isopropyl alcohol?
Yes, it just takes longer. 91% or 99% cuts through resin much faster.
How do I get the smell out of my bong?
The smell is old water and resin. A full clean fixes it. If it's been sitting dirty for a long time, it may take two rounds. For a smell that's gotten into carpet, furniture, or a car, see how to get rid of bong water smell.
Is it OK to put a bong in the dishwasher?
We wouldn't with glass. The heat swings and the rattling can crack it. Metal parts like a stainless steel bowl piece handle it fine.