It's often said that the soul of coffee lies in its beans. Yet, even the freshest beans can sometimes deliver a less-than-pleasing aftertaste.
How to clean a coffee grinder
One possible culprit? Neglected maintenance.
Old residues lingering in your grinding chamber can rob your morning brew of its soulful vibrancy, leaving you with a sourness that echoes the ghosts of coffee's past instead. A thorough cleaning on a regular basis is essential to unlock the full potential of your grinder—and by extension, your coffee.
Learning how to use a coffee grinder and clean it properly depends on your type and model, but a few general principles can help. This guide will walk you through everything you need to know about cleaning your coffee grinder, ensuring every sip delivers pure delight.
Why should you clean your coffee grinder?
Regularly cleaning your grinder is vital for two reasons: coffee flavor and machine efficiency.
As to the second point, coffee grinders can harbor old coffee ground particles that compact over time, potentially clogging the mechanism. This risk increases under certain conditions, like:
● Grinding oil-rich darker roasts
● Opting for a finer grind size for espresso
● Using your grinder daily or multiple times a day
Over time, residual oils and coffee particles can grow stale, even rancid. This ultimately impacts your final brew, making regular deep cleaning not just beneficial, but essential for authentic coffee experiences.
Signs that your coffee grinder needs cleaning
While not everyone uses their coffee grinder daily, every grinder requires periodic cleaning. Naturally, this raises another question: How often should I clean my coffee grinder?
There are no hard and fast rules, but here are a few signs your coffee grinder could be overdue for a thorough cleaning:
● Visible residue or oil buildup
● Off-color grinds after switching beans
● Unusual noises or slower grinding speed
● Difficulty adjusting the grind settings
These symptoms may indicate a buildup of old grounds, which can degrade the flavor of your brew and the grinder's functional lifespan.
Step-by-step guide: Coffee grinder types and how to clean them
There are two main types of coffee grinders: burr grinders and blade grinders. Each one requires a different cleaning approach:
How to clean a burr grinder
Coffee grinder burrs are the go-to choice for coffee connoisseurs, thanks to their consistency. Yet their unique design also makes maintenance a bit more complex.
So how do you clean a burr coffee grinder? Here is a step-by-step guide:
1. Remove any coffee beans from the bean hopper and run the grinder to clear out leftovers.
2. Be sure to unplug the electric grinder before proceeding with any internal cleaning. Safety first!
3. If your machine is clogged or you want to do a deep cleaning, disassemble the grinder burr mechanism.
4. Using a soft brush or old toothbrush, clear out the larger particles and residual coffee dust.
5. Wipe away any remaining oily residue with a damp cloth.
6. Make sure the burrs and other internal parts are fully dried before putting the grinder back together.
Once finished, reassemble the espresso grinder and run a small batch of coffee beans to “season” your burrs in preparation for the next brew.
How to clean a blade coffee grinder
Blade grinders, which simply use two or more spinning blades to chop coffee beans into smaller particles, are much more straightforward. Cleaning steps are as follows:
1. After removing all coffee beans, unplug the grinder.
2. Use a soft brush or compressed air to remove coffee dust.
3. Wipe down the blades (carefully!) and the grinding chamber with a damp cloth.
4. Make sure the blades and other parts are fully dried before plugging the unit back in and grinding again.
To remove deeply set oils, you can also run uncooked rice through the blade grinder for one minute. Note that this is only for blade grinders—running rice through a burr grinder can damage the machinery and may void the warranty.
Deep cleaning vs. regular maintenance: What you need to know
How often and how deeply you clean your espresso grinder depends on your usage habits and type of grinder:
● Blade grinders should ideally be cleaned weekly
● Burr grinders perform best when cleaned monthly
If you grind a lot of darker roasts, more regular cleaning may be needed. This is especially true for burr grinders, as they extract more oils compared to blade grinders.
Maintenance tips for coffee grinder longevity
Even basic cleaning and maintenance can extend the life of your espresso machine and coffee equipment. To keep your grinder in top condition, here are a few final tips to consider:
● Follow manufacturer instructions – Your machine’s instruction manual (likely also available online from the manufacturer's website) should contain specific instructions for cleaning and maintenance.
● Avoid using rice in burr grinders – While a commonly prescribed kitchen shortcut, rice only works on blade grinders. Uncooked rice grains are much harder than coffee beans, and can strain or damage your burr grinder.
● Steer clear of water – Never submerge an electrical appliance. Burrs and blades should always be completely dried if any moisture is used for cleaning. These components are also sensitive to rust, so avoid soaking them in warm soapy water or running them through a machine wash. A damp or dry microfiber cloth can remove most oils.
If you don’t want to disassemble your electric grinder every time, specialty cleaning tablets offer a convenient alternative. These tablets are food-safe and designed to absorb and remove oils from burr grinders without affecting your coffee’s taste.
Get back to the grind with Breville
A little maintenance goes a long way in preserving the rich, full flavor of your favorite coffee. It’s also the key to keeping your espresso machine and equipment in top condition to deliver many more cups to come.
And now that you know how to clean a coffee grinder, why not invest in a high-quality one?
For home baristas seeking to streamline coffee workflows, we recommend intelligent grinders like Breville’s Smart Grinder Pro. With a variety of grind and dosage settings (and an easy-to-clean build to boot), you can fine-tune the perfect grind, every time.
Sources:
1. NY Times. How to Clean a Coffee Grinder. https://www.nytimes.com/wirecutter/guides/how-to-clean-a-coffee-grinder/
2. Hamlet. The Art of Coffee Grinder Seasoning: A Comprehensive Guide. https://hamletwokingham.store/blogs/coffee-brewing-guides/coffee-grinder-seasoning
3. Barazta. Encore ESP Operations Manual. https://assets.breville.com/ZCG495/manual-encoreesp-v1-0-en-010923.pdf
4. Serious Eats. This Is How to Clean Your Coffee Grinder. https://www.seriouseats.com/how-to-clean-coffee-grinder-6742984