Fine Robusta Brewing Troubleshooting: Sour, Bitter, or Flat

If Fine Robusta tastes sour or thin, it may be under-extracted: try a finer grind, hotter water, longer contact, or more agitation.

If it tastes harsh, dry, or excessively bitter, reduce extraction with a coarser grind, cooler water, shorter time, or less agitation.

If it tastes flat, check freshness, water quality, dose, and whether the coffee itself has lost aroma.

Practical takeaway: change one variable at a time. Troubleshooting works best when the recipe is recorded and the problem is described precisely.