
Every dab rig, bong, and glass tip eventually hits the same wall: brown resin coating the walls, a cloudy downstem, and a hit that tastes like last month's session instead of the flower you just bought. The fix costs a few baht and takes fifteen minutes. Isopropyl alcohol, or ISO, is what every serious glass owner keeps under the sink, and here's how to use it properly.
Why isopropyl alcohol works on resin
Resin and reclaim are sticky, oily residues that water alone won't shift. Isopropyl alcohol is a solvent that dissolves them on contact, breaking the bond between the gunk and the glass. Pair it with something coarse to scrub the surfaces you can't reach with a brush, and the residue lifts off in minutes. It evaporates fast, leaves no smell once dry, and is safe on borosilicate glass, which is what quality rigs and tips are made from.
What you need to clean a bong or rig
- Isopropyl alcohol, 91% or 99% strength. 70% works but takes longer and leaves more water behind
- Coarse salt (rock salt, kosher salt, or ordinary sea salt)
- A zip-lock bag or sealed container for smaller pieces
- Rubber stoppers, silicone plugs, or your hands and some patience
- Warm water for rinsing
- Pipe cleaners or cotton buds for stubborn spots
How to clean a glass rig step by step
- Empty the rig and rinse it with warm water to loosen surface residue. Hot water can crack cold glass, so warm is the word.
- Pour in enough ISO to cover the dirtiest areas, usually a third of the chamber. Add a generous tablespoon of coarse salt.
- Plug the openings and shake. The salt scrubs while the alcohol dissolves. Thirty seconds to a couple of minutes depending on how neglected it is.
- For heavy buildup, let it soak for 20 to 30 minutes before shaking again.
- Pour out the dirty alcohol, then rinse thoroughly with warm water until the smell is gone. Rinse more than you think you need to. Any alcohol left inside will taste awful and shouldn't be inhaled.
- Let it air-dry completely before use.
Cleaning glass tips, bowls and downstems
Glass tips, bangers, bowls, and downstems fit in a zip-lock bag. Drop them in with ISO and a pinch of salt, seal it, and shake for a minute. Leave stubborn pieces soaking for half an hour, then rinse and dry. Cotton buds dipped in ISO handle the inside of a glass tip better than anything else.

How to clean a quartz banger
A quartz banger needs gentler treatment. Skip the salt, which scratches quartz, and soak it in ISO alone before wiping clean with a cotton bud. Never dunk a hot banger in alcohol.

Mistakes to avoid
- Don't heat isopropyl alcohol or use it near an open flame. It's flammable.
- Don't skip the rinse. This is the most common mistake.
- Don't use salt on quartz or on any piece with a delicate percolator.
- Don't leave ISO in a sealed rig for days; it's a solvent, not a storage solution.
- Dispose of the dirty alcohol responsibly rather than pouring it down the sink if you can avoid it.
How often should you clean your glass?
Daily users should clean a rig weekly and swap water every session. Glass tips are quick enough to clean after every few uses. Clean glass isn't about appearances: resin buildup harbors bacteria, restricts airflow, and masks the terpene flavor you paid for.
What about the reclaim?
If you're cleaning a dab rig, that brown alcohol you pour out is full of reclaim. Some people evaporate it on a dish to recover the concentrate, but the residue is degraded and harsh, and the process needs to be done well away from any flame. For most people it's better to just pour it out and buy fresh.
Where to buy isopropyl alcohol and glass tips in Phuket
Pharmacies across the island stock 70% isopropyl alcohol; 91% and above is harder to find but worth hunting for. Good Kush Bar in Karon, near Kata Beach, keeps glass tips, cleaning tools, and rolling supplies in stock, and our staff are happy to show you the shake-and-rinse method in person.
Cleaning glass with isopropyl alcohol — FAQ
What percentage isopropyl alcohol is best for cleaning a bong?
91% or 99%. Higher concentrations dissolve resin faster and leave less water behind. 70% still works with a longer soak.
Can I use rubbing alcohol and salt to clean a dab rig?
Yes. Isopropyl alcohol dissolves the resin and coarse salt acts as an abrasive. Shake, soak if needed, then rinse thoroughly with warm water.
Is it safe to clean a quartz banger with isopropyl alcohol?
Yes, but skip the salt, which scratches quartz. Soak the cold banger in ISO alone and wipe with a cotton bud.
How long should a glass rig soak in isopropyl alcohol?
Light residue lifts in a minute of shaking. Heavy buildup needs a 20 to 30 minute soak, then another shake.
Do I need to rinse after cleaning with isopropyl alcohol?
Always. Rinse with warm water until there is no alcohol smell, then air-dry fully before use.
Where can I buy glass tips in Phuket?
Good Kush Bar at 119/1 Koktanod Rd, Karon, Phuket stocks glass tips, cleaning tools, and rolling supplies.
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