How to Clean a Bombilla (So It Never Clogs)
Rinse and push hot water through after every session, deep-clean weekly by disassembling or soaking, and dry it fully — the simple routine that keeps a bombilla flowing and mold-free.
By The Yerba Mate Reviews Desk · 7 min · Updated 2026-06-14
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To clean a bombilla: rinse it under hot water after every use and push hot water back through the straw to flush out trapped yerba, then stand it up to dry fully. For a deeper clean every week or two, disassemble it if it's a spring or screw type (or soak it whole if it's not), give it a soak in warm water with a spoon of baking soda, push hot water through again, and dry it completely before storing.
The whole point is to stop two problems before they start: a clogged filter that won't draw, and mold growing inside a straw that was put away wet. Both come from the same cause — fine yerba dust left sitting in a damp bombilla — and both are easy to prevent with a 20-second rinse.
Here's the full routine step by step, plus how to deep-clean a spring bombilla, which comes apart for the most thorough job.
The short version
- Rinse the bombilla under hot water and push hot water through it after every single session — this clears most yerba before it can dry and clog.
- Dry it fully, standing up, after every use; a bombilla put away wet is what grows mold.
- Deep-clean every week or two with a warm water + baking-soda soak, then flush hot water through.
- Spring bombillas unscrew/come apart for deep cleaning — pull off the spring coil and clean it separately for the most thorough job.
- For sealed (non-disassembling) bombillas, soak the filter end and push hot water through repeatedly to flush trapped dust.
- A pipe cleaner or thin brush run through the tube clears stubborn clogs.
- Why it matters: trapped fine yerba dust clogs the filter so it won't draw, and a damp bombilla grows mold inside.
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Question 1 of 6
First things first — what are you after with yerba mate?
Why a bombilla clogs (and molds)
A bombilla clogs because fine yerba dust gets trapped against the filter and dries into a plug; it molds because that damp, yerba-packed straw gets put away without drying. Both problems share one root cause — leftover yerba sitting wet inside the tube — and both are entirely preventable.
The fine, powdery cuts of mate (especially stemless, sin-palo Uruguayan styles) shed the most dust, so they clog filters fastest. When that dust packs the filter holes, the bombilla stops drawing and you get nothing but air and gurgle. And because the inside of a used bombilla is dark, damp, and full of organic residue, it's an ideal spot for mold if you skip the dry step.
Deep-cleaning a spring bombilla
A spring bombilla is the easiest type to deep-clean because it comes apart. Instead of a perforated 'duckbill' or coil-screen fused to the tube, a spring bombilla has a tightly-wound metal coil at the filter end that you can slide off, and many screw apart in the middle as well.
To deep-clean one, pull off the spring coil and unscrew the body, then soak the pieces in warm water with baking soda, work the coil between your fingers under running water to dislodge trapped dust, and run a pipe cleaner through the tube. Because the spring opens up, you can reach residue that's impossible to clear in a sealed bombilla — which is exactly why spring bombillas are the recommended choice for the fine, dusty cuts that clog ordinary straws. Rinse, reassemble, and dry fully.
Cleaning a sealed (one-piece) bombilla
Not every bombilla comes apart. Many traditional alpaca and stainless bombillas have a fixed filter that you can't disassemble. For these, the routine is the same minus the taking-apart: rinse hot, soak whole, and flush.
Submerge the filter end in warm water with baking soda for half an hour, then repeatedly push hot water through from the mouth end to jet trapped dust out of the filter holes. If a clog won't budge, soak longer and work a pipe cleaner or thin wire gently through the tube. The key with sealed bombillas is to never let dust build up in the first place — flush them faithfully after every use, because you can't open them up to rescue a badly clogged one.
How to Clean a Bombilla
- 1
Rinse and flush after every use
Right after a session, rinse the bombilla under hot running water and push hot water back through the straw from the mouth end so it jets out the filter end. This flushes out the loose yerba before it can dry inside and clog the filter.
- 2
Disassemble it (spring and screw types)
If your bombilla is a spring or screw-apart type, unscrew it or slide off the spring coil at the filter end. Taking it apart lets you reach the spots where fine dust collects. A sealed, one-piece bombilla can't be opened — skip to soaking it whole.
- 3
Soak in warm water with baking soda
Once a week or two, soak the bombilla (or its parts) in warm water with a teaspoon of baking soda for 15–30 minutes. The baking soda loosens stuck-on yerba residue and helps cut any odor without harsh chemicals.
- 4
Push hot water through and brush the tube
After soaking, push hot water back through the straw again to flush out everything the soak loosened. For a stubborn clog, run a pipe cleaner or a thin bottle brush through the tube and gently work the filter holes clear.
- 5
Reassemble and dry it completely
Slide the spring back on or screw the bombilla back together, then stand it upright (filter end up) somewhere airy and let it dry all the way through before storing. A fully dry bombilla can't grow mold.
Key terms
- Bombilla
- The filtered metal straw used to drink yerba mate. It strains the leaf and dust so you sip only the liquid, which is exactly why its filter needs regular cleaning to avoid clogging.
- Spring bombilla
- A bombilla whose filter is a removable coiled spring (and often a screw-apart body). It disassembles for thorough deep cleaning and handles fine, dusty cuts best.
- Sin palo
- Stemless, finely-cut yerba mate (the Uruguayan style). It's powdery and sheds the most dust, so it clogs bombilla filters fastest and rewards diligent cleaning.
- Filter end
- The flared, perforated bottom of the bombilla that sits in the leaf and strains the brew. It's where dust collects and clogs, so it gets the most cleaning attention.
Questions, answered
How do you clean a bombilla?
Rinse it under hot water and push hot water back through the straw after every use, then dry it fully. Every week or two, deep-clean it: disassemble spring or screw types (or soak sealed ones whole), soak in warm water with baking soda, flush hot water through, brush the tube if needed, reassemble, and dry completely.
How do you unclog a bombilla?
Push hot water back through it from the mouth end to jet out the trapped dust, then soak the filter end in warm water with baking soda. For a stubborn clog, run a pipe cleaner or thin brush through the tube. If it's a spring bombilla, slide off the spring and clean it separately — that clears almost any clog.
How often should you clean a bombilla?
Rinse and flush hot water through after every single session, and dry it fully each time. Do a deeper baking-soda soak about once a week or two, more often if you drink fine, dusty sin-palo mate that clogs filters faster.
Can you disassemble a bombilla to clean it?
Some types, yes. Spring and screw bombillas come apart — you can slide off the spring coil and unscrew the body for a thorough clean. Sealed, one-piece bombillas (many traditional alpaca and stainless ones) don't disassemble, so you soak and flush them whole instead.
Why is my bombilla moldy?
Because it was put away damp with yerba residue inside. The dark, wet interior of a used bombilla grows mold if it isn't dried. Always flush it with hot water and stand it up to dry fully after every use — a completely dry bombilla can't mold.
Can you use soap to clean a bombilla?
Most mate drinkers skip soap because it can leave a lingering taste in the metal; a warm water and baking-soda soak cleans and deodorizes effectively without it. If you do use a mild soap, rinse very thoroughly and flush plenty of hot water through afterward.
Keep reading
The Best Bombilla
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How to Prepare Yerba Mate (Step by Step)
Set the bombilla and pour — the traditional method.
How to Cure a Yerba Mate Gourd
Season a natural gourd and keep it mold-free.
The Best Yerba Mate Starter Kit
Gourd, bombilla, and leaf — everything to begin.
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Our anchor roundup across every style and strength.