if sour: go 2–4 clicks finer and/or increase temp by 1–2°C and add 15–30s steep. if bitter: go 2–4 clicks coarser and/or reduce temp by 1–2°C or shorten steep/drain earlier.
Sour → grind 2–4 clicks finer, raise temperature 1–2°C or extend steep 15–30s. Bitter → grind 2–4 clicks coarser, lower temperature 1–2°C or open the switch earlier to shorten contact time.
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