Clean a glass weed pipe with 91% isopropyl alcohol and coarse salt. Soak the pipe for 30 minutes. Shake it in a sealed container. Rinse with warm water. Dry it before use. For daily smokers, clean the pipe every 1 to 2 weeks.
What you need
- 91% or 99% isopropyl alcohol. Plain, no wintergreen or dye.
- Coarse salt. Kosher salt or rock salt. Table salt dissolves fast.
- Glass jar with a lid or zip-top bag
- Warm water
- Pipe cleaners or a bamboo skewer
- Paper towel
Step by step
- Empty ash and loose resin into the trash. Do not tap the pipe on a hard surface.
- Put the pipe in the jar or bag.
- Add 1 to 2 tablespoons of coarse salt.
- Pour isopropyl alcohol until the pipe is covered. Use 1/2 cup for a hand pipe.
- Seal the container. Shake for 30 seconds.
- Wait 30 minutes. For heavy resin, wait 8 hours or overnight.
- Shake again for 30 seconds. Salt acts as an abrasive on the inside glass.
- Remove the pipe. Run warm water through the bowl and stem.
- Scrub the bowl hole and stem with a pipe cleaner. Use a bamboo skewer for clogged holes.
- Rinse with warm water until the glass feels smooth. Dry with a paper towel. Wait 10 minutes before use.
Heavy resin and clogged pipes
Resin builds in the bowl, stem, and carb hole. A pipe with low airflow needs a longer soak. Use 99% isopropyl alcohol for thick resin. Add a second salt shake after the first rinse. For a stem clog, push a pipe cleaner from the mouthpiece end. Do not force a metal tool through the bowl hole. Metal can chip glass.
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Safety and disposal
Isopropyl alcohol is flammable. Keep the container away from flame, pilot lights, and sparks. Work in a room with airflow. Wear gloves if your skin reacts to alcohol. Let the used alcohol evaporate in a ventilated area. Throw the resin in the trash. Do not pour alcohol down the drain.
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How often to clean
Daily use: every 1 to 2 weeks. Shared pipes or concentrate use: every 3 to 5 days. Change bong water daily. Clean when taste turns harsh or airflow drops.
What not to do
- Do not boil glass. Thermal shock can crack it.
- Do not use acetone on painted or colored glass.
- Do not use table salt for a long soak. It dissolves and loses grit.
- Do not skip the final rinse. Leftover alcohol tastes harsh and burns.
Health note
Cleaning reduces resin buildup and harsh taste. It does not remove health risks from smoke. The CDC states cannabis smoke contains tar and lung irritants. NIDA reports that cannabis smoke deposits tar in the lungs. Clean glass is a taste and airflow step, not a safety step.