The grinder holds on to coffee between doses
Less coffee comes out than went in, and the first dose after a change of bean tastes of the previous one.
Applies to: Espresso machine, Espresso, Filter coffee
Likely causes and adjustments
Try one adjustment at a time so you know what actually changed the result. Start with the first cause below — if it doesn't help, reveal the next.
Cause 1 of 3 · Commonly the cause
Coffee held in the chute and around the burr carrier
Clear the chute with a bellows or brush after each dose, and weigh the ground coffee rather than the beans.
Related issues
Work it out
Interactive tools that take you through this one change at a time.
Learn the technique
Step-by-step guides to the skills this problem comes from.
- Purging a grinderClear coffee left inside the grinder so the next dose is the coffee and the setting you intended.
- Single dosing a grinderGrind exactly the beans you weighed for this brew, with as little left inside the grinder as possible.
- Cleaning a grinderRemove built-up coffee oils and retained grounds without damaging the burrs.