Still tasting off? Adjust your brew ratio. In hot weather, a slightly shorter ratio—like 1:1.8 instead of 1:2—can brighten the cup without going sour. Use a scale to keep consistency. Also check your water temperature. If you're using boiling water, let it sit 30–60 seconds after boiling to drop to around 90–92°C. Hotter water extracts more bitter compounds, and your beans are already more fragile in the heat.