Machine ((link)): Anomalous Coffee

The true value of these machines is in their versatility. For instance, in a hiking scenario, a user might use a hand-press machine for a fresh morning espresso, a cold-brew function during the day, and a manual milk frother for a latte at camp.

If your machine produces a sour shot when the gauge says it should be bitter, do not adjust your grind. Instead, taste the water. In many anomalous cases, the water chemistry has not changed, but the extraction efficiency has. Trust your palate over your sensors. Anomalous Coffee Machine