Why does my espresso come out sour only after changing the grinder setting?
Our answer
Grind finer or increase extraction temperature/time in small steps; under-extraction is a common cause of sour espresso.
Why this approach makes sense
Materials, cleaning instructions and equipment design vary. Pick a reversible approach that fits the exact surface or appliance.
Before you try it
Check the model instructions and test on a small area before committing to a permanent change.
Questions people ask
What might explain the problem involving my espresso come out?
Grind finer or increase extraction temperature/time in small steps; under-extraction is a common cause of sour espresso.