Most disappointing V60s come down to a handful of problems, and you can usually tell which one from two things: how the cup tastes, and how fast the water drained. Here's how to read your coffee and what to change first.
Taste it warm, not hot
Very hot coffee shows off its aroma but hides sweetness, balance and faults. Take a first sip for the smell, then judge the cup when it's warm, roughly ten to fifteen minutes after the drawdown. Sourness and dryness get easier to notice as coffee cools, so a little extra tartness in the last sip is normal, especially with light roasts. Change the recipe only if the warm sip was off too.
Sour or bright?
Both come from acids. Bright acidity tastes juicy and arrives with sweetness. Sourness is sharp, thin and puckering, with little sweetness and a finish that disappears quickly.
Bitter or drying?
Bitterness is a taste, felt most in the finish. A little adds depth. Drying, or astringency, is a feeling: rough and puckering, like over-steeped tea. People often call a drying cup bitter, but in a V60 dryness usually points to an uneven brew rather than one that ran too long.
What it means, and what to change first
Read the taste together with the drawdown. Sour and fast, bitter and slow, and both at once each have a different fix.
Sour, thin, short
Under-extracted
Grind too coarse, a fast drawdown, water that's too cool, or dry pockets left after the bloom.
First change: Grind 1–2 clicks finer and aim for the recipe's target time.
Bitter, harsh, lingering
Over-extracted
Grind too fine, a slow or stalled drawdown, or too much stirring and swirling.
First change: Grind 1–2 clicks coarser and pour more gently.
Sour and bitter or drying at once
Uneven extraction
Water running down the paper, a high ring of dry grounds, an uneven bed, or fines clogging the filter. Some coffee is over-extracted while the rest is under.
First change: Fix the pour before the grind. Pour lower and in the center with a steady stream, and finish with a gentle swirl so the bed is flat. If it drained slowly, go a little coarser too.
Heavy and crowded
Too strong
The ratio is too tight for this coffee or for you.
First change: Add water. Move about one step, for example from 1:15 to 1:16.
Watery and faint
Too weak
The ratio is too loose, or the water ran through too quickly.
First change: If it drained fast, grind finer. If not, use a little more coffee for the same water.
The same fault, brew after brew
Possibly the coffee
Roast, freshness or the beans themselves, not your technique.
First change: Brew it as a simple cup: about 11 g of coffee in 200 g of hot water, stir, wait four minutes, skim, and taste when warm. Nothing can channel in a cup, so if the fault is still there, it's the beans.
Change one thing at a time
Keep everything else the same, write down what you changed, and taste again. Two changes at once make it hard to know which one helped. Grind and pouring are the strongest levers. In a UC Davis study, brew temperature on its own made little difference once strength and extraction were held steady, so reach for the grinder before the kettle dial.
How Pour helps
After each brew, Pour asks how it drained and how it tastes, explains each tasting word in plain language, and suggests one change for the next cup, such as "Grind 1–2 clicks finer and repeat the same recipe." Your notes stay with the recipe, so you can see what worked the last time.
