The shot changed unexpectedly after a grind adjustment
A small grind change produced no effect, or a much larger effect than expected, or the effect arrived a shot late.
Applies to: Espresso machine, Espresso
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 4 · Commonly the cause
Retained coffee at the old setting
Purge after every adjustment; the first shot afterwards is a mixture of two settings.
Related issues
Learn the technique
Step-by-step guides to the skills this problem comes from.
- Adjusting grind sizeMove the grind in the right direction by a useful amount, and know what to expect from the change.
- Purging a grinderClear coffee left inside the grinder so the next dose is the coffee and the setting you intended.
- Storing and freezing coffeeSlow staling for coffee you will drink soon, and stop it almost entirely for coffee you will not.
- Resting roasted coffeeLet a fresh roast settle to the point where it brews predictably, without waiting until it has gone flat.