
Problem Cause
Dirty Equipment
Coffee oil buildup and residue affecting extraction and flavor
How to Identify This Issue
- 1Rancid or off flavors
- 2Visible buildup in portafilter
- 3Clogged shower screen
- 4Slow water flow without coffee
- 5Brown residue on group gasket
Visual Cues

Ground texture and uniformity

Puck surface and distribution
Related Symptoms
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