Cleanliness and stable temperature at the group head affect extraction. Regular flushing and cleaning prevent off-flavors.
The part of the espresso machine where the portafilter locks in and water exits.
Updated February 19, 2026
Cleanliness and stable temperature at the group head affect extraction. Regular flushing and cleaning prevent off-flavors.
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Trzecia Kawa
Poznan
Kawiarnia specialty w Poznan.
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