Last updated 2026-08-04
Cleaning
How to Clean a Glass Pipe
If it tastes harsh, that is usually the glass and not the flower. This is a five-minute job that most people do far less often than they think they do.
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Why salt is the ingredient that matters
The classic method is isopropyl alcohol and coarse salt, and people often assume the alcohol is doing the work. It isn't doing all of it. Alcohol dissolves the resin; the salt is an abrasive that scours the inside of a shape you can't get a brush into. Skip the salt and you get a slow soak that leaves a film behind.
Coarse is the operative word. Table salt is too fine to scrub with, and rock or sea salt has the grain the job needs. Epsom salt works too.
The method
Seal the openings, add alcohol and a generous pinch of coarse salt, shake for about a minute, leave it if it is bad, shake again, then rinse thoroughly with hot water, though not boiling. Rinse for longer than feels necessary; the taste of leftover cleaner is worse than the resin was.
Sealing the ends is the difference between a cleaning method and a mess. Silicone plugs and caps do it properly, and a zip bag is the improvised version for a piece that has none. A dedicated soaker bag holds the whole thing and lets you shake without wearing any of it.
Purpose-made cleaners work faster and need less shaking, which matters for anything with percolators or narrow chambers that salt can't reach.
Cleaning
Formula 420 Cleaner (2-Pack)
Cleans glass, metal and ceramic pieces without scrubbing. Shake about a minute, rinse, done. Two 12 oz bottles, months of regular maintenance.
Cleaning Tools
Flexible Tube Cleaning Brushes (10-pack)
Cleaner shifts the residue; a brush gets it out of the places the cleaner cannot reach. Flexible nylon, long enough for a stem or a downstem, and meant to be thrown out when they are done.
Cleaning Seals
Hemper Plugs + Caps
Silicone stoppers that seal the openings so you can add cleaner, shake the piece and put it down without emptying it over the counter. Fits male and female joints, and it is reusable where most plugs are consumable. It also glows, which is genuinely useful for finding a small plug that has rolled off the counter.
Cleaning Kit
Silicone Cleaning Kit
A reusable soaker bag with brushes, caps, plugs, a funnel, a mat and a cloth, so you have everything except the cleaner. The bag is the clever part: a piece soaks away inside it and the whole kit goes back in a drawer afterward.
How often is often enough
More often than you're. A useful signal is taste instead of appearance: when it starts tasting of the last few sessions rather than of what you just put in it, it is overdue. For regular use that tends to land around weekly.
A quick rinse with hot water after use, before anything dries and hardens, removes most of the reason for a deep clean. It takes ten seconds and it is the single habit that makes this whole page less relevant.
The two things that break glass
Thermal shock. Boiling water onto cold glass, or cold water onto a piece still warm from use, cracks it. Warm water, and let it come to temperature first.
The sink. Most pipes die in a ceramic basin instead of in use. A towel in the bottom of the sink costs nothing and prevents the common accident.
Wood is the exception to all of this. A wooden pipe should not be soaked in alcohol at all. Brush it out dry, wipe the stem, and leave the liquid methods for glass, silicone and metal. Our guide to choosing a hand pipe covers what each material asks of you.
The rest of the gear
Cleaning is one section of a longer guide covering storage, odor, grinders, rolling, pipes and the rest.
Informational only
General information about maintaining equipment. Not medical or legal advice, and nothing here says cannabis treats any condition. Isopropyl alcohol is flammable, so keep it away from the lighters two sections along in the shop, and rinse thoroughly before any piece goes near a flame.