Grinding
How Often Should You Clean Your Espresso Grinder?
Grinder cleaning is easy to neglect because a dirty grinder does not fail outright — it just slowly gets worse, which makes it easy to attribute the decline to something else entirely.
Daily: a quick brush-out
A quick brush of the chute and grounds bin after use prevents old grounds from mixing with fresh ones and going stale or rancid, especially in a humid kitchen where residual coffee oils turn rancid faster than in a dry environment.
Periodically: a deeper clean
Follow your manufacturer's documented cleaning interval for a fuller clean of the burr chamber, which removes built-up coffee oils that can turn rancid and affect flavor. Grinders with a quick-release burr system (like the Baratza Encore ESP) make this meaningfully faster than ones requiring a full teardown, which in practice means it actually gets done on schedule rather than postponed.
Watch for the warning signs
Increasingly inconsistent grind, unusual noise, or a stale or off taste that persists across fresh beans are all signs a clean is overdue, regardless of the calendar. A sudden change in how a familiar bean tastes, with no change in your recipe, is a common tell that oil buildup — not the beans — is the actual culprit.
What happens if you skip cleaning for too long
Rancid oil buildup inside the burr chamber does not just add a stale taste — in mild cases it can also affect grind consistency by causing fine particles to clump around oily residue instead of falling freely, which shows up as inconsistent shot times even with an unchanged grind setting.