How to Clean a Coffee Grinder — Toronto Home Guide

Coffee grinders accumulate stale coffee oils and fine grounds that make fresh coffee taste bitter and rancid. A quick clean after every few uses keeps flavour clean, and a deeper clean once a month removes built-up oil residue.

Blade Grinder — Dry Clean (After Each Use)

1. Unplug the grinder
2. Tap the grinder upside down over the bin to dislodge loose grounds
3. Use a dry pastry brush or stiff paint brush to sweep grounds from the inside walls and around the blade
4. Wipe the inside with a dry cloth
5. Remove the lid and wash it separately with soap and water if it has grounds on it

Do not add water to the grinder body — the motor base is not waterproof.

Blade Grinder — Rice Clean (Monthly)

1. Add 2–3 tablespoons of dry white rice to the grinder
2. Pulse until the rice is ground to a fine powder — the rice absorbs oils and dislodges compacted grounds
3. Discard the rice powder and brush out the inside
4. Wipe clean with a dry cloth

Burr Grinder — Deep Clean

1. Unplug and disassemble — remove the hopper, upper burr, and grounds bin according to the manufacturer's instructions
2. Brush all surfaces with a stiff grinder brush or pastry brush, paying attention to burr grooves where compacted oils accumulate
3. Wash removable plastic parts (hopper, grounds bin) with warm soapy water, rinse, dry completely
4. Use a vacuum on a low setting to pull fine grounds from the burr chamber
5. Run grinder cleaning tablets (like Urnex Grindz) through the grinder monthly per the package instructions — these absorb oils more effectively than rice and are designed for burr grinders
6. Reassemble when all parts are completely dry

Tips

• Never wash the burrs or motor body under water
• Store coffee beans in an airtight container rather than in the grinder hopper — oils from beans left in the hopper go rancid quickly