Mavo PPC-01 Manual Coffee Grinder
A burr coffee grinder, a solid pick for dialling in espresso and filter coffee at home.
How to Clean a Coffee Grinder (Burr and Blade)
Coffee oils and old grounds build up in a grinder and turn rancid, dulling the taste of fresh beans. This guide covers how to clean both burr and blade grinders and keep your coffee tasting fresh.
The short answer
Clean a grinder regularly by brushing out old grounds, wiping the burrs and chamber, and occasionally deep-cleaning. Old coffee oils go rancid and taint fresh beans, so a quick brush-out often plus a deeper clean periodically keeps coffee tasting its best. Always unplug an electric grinder before cleaning, and follow the maker's guidance for dismantling the burrs.
Why cleaning matters
Coffee beans are oily, and those oils and fine grounds coat the burrs, chamber and hopper over time. Left alone they go stale and rancid, adding bitter, off flavours to even the freshest beans. Regular cleaning removes this build-up, so your grinder delivers the clean, bright taste your good beans deserve - it is an easy, often-overlooked upgrade.
Quick regular cleaning
For frequent upkeep, brush out loose grounds from the burrs and chamber with a stiff brush, and wipe the hopper and exit chute with a dry cloth. Doing this every week or two stops oils building up. On manual grinders, brushing the burrs and emptying the catch cup is usually all the routine care they need between deeper cleans.
Deeper cleaning
Periodically, dismantle the burrs following the manual and brush them thoroughly to remove caked oils and grounds. Some grinders allow grinder-cleaning tablets or rice (check the maker's advice first, as some warn against rice). Wipe metal parts dry - avoid water on burrs and electronics unless the manual says a part is washable, since moisture causes rust and clumping.
Blade grinders
Blade grinders are simpler: unplug, then wipe the chamber and blade with a dry cloth or brush, and remove grounds. A small amount of rice ground briefly can help lift oils on some models. Keep water away from the motor and blade housing. Because they are cheaper, blade grinders need less involved care, but the same rancid-oil principle applies.
Common mistakes to avoid
- Cleaning an electric grinder without unplugging it first.
- Using water on burrs or electronics that are not washable.
- Letting oils build up until coffee tastes rancid.
- Using rice or tablets without checking the maker allows it.
- Reassembling burrs incorrectly, which affects grind settings.
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Frequently asked questions
How do you clean a coffee grinder?
Brush out old grounds and wipe the burrs and chamber regularly, then deep-clean periodically by dismantling the burrs to remove caked oils. Unplug an electric grinder first, and avoid water on burrs and electronics unless they are washable.
How often should you clean a coffee grinder?
Brush out grounds every week or two to stop oils building up, and do a deeper clean periodically depending on how much you grind. Regular cleaning prevents rancid oils from tainting your fresh beans.
Can you wash coffee grinder burrs with water?
Usually not - water causes rust and clumping on most burrs, so brush them dry instead. Only wash parts the manual states are washable, and keep water away from the motor and electronics entirely.
Bottom line
Our top pick is the Mavo PPC-01 Manual Coffee Grinder (our score 9.5/10) - A burr coffee grinder, a solid pick for dialling in espresso and filter coffee at home..