How to Clean Your Coffee Grinder

Coffee grinders accumulate oily residue and stale grounds over time. Cleaning them regularly keeps your coffee tasting fresh and your burrs cutting cleanly.

Coffee oils are persistent. They coat the burrs, the chute, and the dosing chamber, and over time they turn rancid — affecting the taste of even the freshest beans. A clean grinder is one of the more underrated factors in good coffee at home.

Weekly: Brush the Hopper and Chute

Empty the hopper of any remaining beans. Use a small brush — most grinders come with one, or any soft brush works — to sweep loose grounds out of the hopper, around the burr opening, and through the chute where ground coffee exits.

Pay special attention to the chute. Stale grounds accumulate there between uses and can contribute to off flavors and clumping.

Monthly: Cleaning Tablets

Grindz cleaning tablets are designed to absorb oils and clear out residue inside the grinder. They look like small pellets but are made from food-safe materials that won't damage your burrs.

1. Empty the hopper completely.

2. Add the recommended amount of cleaning tablets to the hopper — check the package for dosage, as it varies by grinder size.

3. Grind through them as if they were coffee. The tablets absorb oils as they pass through the burrs.

4. After grinding through the tablets, grind through 20 to 30g of sacrificial coffee beans. This purges any tablet residue from the system.

5. Discard the ground tablets and the sacrificial coffee. Both go in the trash, not in your cup.

Every 3 to 6 Months: Disassemble the Burrs

For a deep clean, the top burr can usually be removed — procedure varies by grinder, so check your manual. With the burrs accessible, brush them thoroughly to remove any built-up grounds. A toothbrush or stiff brush works well.

Do not wash burrs with water. Most are made from steel and will rust. Brush only.

While the burrs are out, brush out the burr chamber and inspect the burrs themselves for visible wear or chipping. How long burrs last depends entirely on the grinder — check your manual for the manufacturer's recommended replacement interval.

Espresso vs. Drip Grinders

Espresso grinders see more oil because espresso often uses darker roasts and a much finer grind setting — more surface area for oils to coat. They need cleaning more often. If you grind espresso daily, monthly cleaning tablets are appropriate. For drip grinders used a few times a week, every other month is usually fine.

Signs Your Grinder Needs Cleaning

Off, stale, or rancid taste even with fresh beans. Visible buildup of grounds in the hopper area, around the burr, or in the chute. Sluggish or noticeably slower grinding. Clumping that wasn't there before. All point to oil buildup.