First aid: filter coffee & hand brewing — solve problems yourself

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Filter coffee and hand brewing methods are mechanically simpler than an espresso machine — but that's exactly why a few small details make the difference between "drips forever" and a well-balanced cup. Here you'll find the most common stumbling blocks with V60, Chemex, AeroPress, French Press, Cold Brew, moka pot and Wacaco — and what actually helps.

⚠️ Most important first: We only show steps the manufacturers themselves recommend. Moka pots build up steam pressure while brewing — use a low flame, and never block or dismantle the safety valve yourself. With all methods: handle freshly boiled water carefully, and never underestimate the risk of scalding.

1. "My V60/Chemex drips forever (or way too fast)"

  1. Chemex: always place the triple-layer side of the filter towards the spout, grind size "medium coarse".
  2. V60: pre-rinse the filter, then bloom — with double the amount of water relative to your coffee dose (by weight), then pour the rest in 3 spiral pours up to your target weight. Taste decides, not the clock.
  3. Pour speed is your most important lever — slower = longer, faster = shorter.
  4. Grind fresh and evenly; avoid channelling in the coffee bed.

Sources: Chemex — FAQ · Hario — V60 Guide · Video: Hario — The V60 Dripper

Stop line: If it's still just as wrong despite adjusting your technique, it's usually the grinder — don't dismantle electric grinders yourself while under warranty.

Understand the technique: Filter Coffee Simulator · Gear: Hario · Chemex

2. "AeroPress is hard to press down, jams or spits"

  1. Grind coarser — before pressing, around 2–3% should already drip through on its own.
  2. Press gently and in stages: about 1 cm at a time with a short pause, pressure not speed.
  3. Clean coffee oils out of the chamber regularly.
  4. Oil the seal with a very thin layer (official AeroPress recommendation).
  5. Replace a worn seal — the most common cause of jamming.

Source: AeroPress Help Center — "hard to press"

Stop line: Never force it down on an unstable vessel; don't boil the plunger.

Gear: AeroPress seals & filters

3. "French Press or Cold Brew: grounds in the cup, cloudy or bitter"

  1. Grind coarse, steep for around 4 minutes per the manufacturer's guideline — taste and adjust, then press slowly.
  2. Hario Mizudashi (Cold Brew): around 80 g of coffee to around 1150 ml of water, steep cold for around 8 hours per Hario's guideline — adjust to taste.
  3. Remove the filter/sieve after steeping/brewing — if you leave it in, Hario says it turns bitter.
  4. Store cold and drink within 2–3 days.
  5. Take the filter apart and clean it regularly.

Sources: Hario — Mizudashi Manual (PDF) · Bodum — Chambord Guide

Stop line: Don't keep using a cracked glass carafe; never put glass directly on the stovetop.

Gear: French Press · Cold Brew equipment

4. "Moka pot won't come up, sputters, or tastes burnt/rubbery"

  1. Low flame — Bialetti explicitly calls for "minimum flame".
  2. Grind coarser than for espresso, don't press or tamp.
  3. Take it off the heat immediately at the first gurgling/hissing.
  4. Replace the seal at least once a year; plan for one throwaway brew afterwards.
  5. Screw it together firmly but not over-tight; avoid hard water (→ Brita/Apax, see Water & Descaling).

Sources: Bialetti — How the Moka Works · Bialetti — What is the Purpose of a Moka Gasket

Stop line: Never dismantle the safety valve. If the valve or thread is damaged, it's a pressure vessel — stop using it and replace it.

Gear: Moka pot accessories

5. "Wacaco on the go: barely any pressure, thin coffee, no crema"

  1. Grind fine ("table salt" consistency), dose around 8 g for the Nanopresso.
  2. Preheat the water to 90–96 °C.
  3. Screw the head on firmly, measure the dose exactly.
  4. About 1 pump per second, evenly.
  5. Rinse after every use; deep-clean the seal monthly and the mesh every 6–12 months.

Source: Wacaco — Common Nanopresso Brewing Mistakes

Stop line: Don't take it apart any further than described in the manual; never open the hot device under pressure.

Gear: Wacaco · Outdoor equipment

Nothing helped? Then we're on it.

Fastest way to reach us, around the clock: Ask Jackson, our AI coach in the chat here on the website — he'll help you right away with anything, from product recommendations to troubleshooting.

For anything else — or if it's a warranty case — this helps us help you without back-and-forth:

  1. Reply to your order confirmation — that way we have your order number straight away. (Can't find the email? Write to office@coffeecoachingclub.ch and give us the order number.)
  2. Device & purchase date: model, serial number (a photo of the nameplate is enough), purchased on …
  3. Describe the fault: what exactly happens, since when, how often?
  4. What you've already tried: which steps from this page?
  5. Photos & videos: of the problem and the nameplate — for noises, please include a video with sound. Large videos (over ~20 MB) as a link.

We'll get back to you within 1–2 business days. Prefer to talk in person? Book an appointment or drop by in Zurich & Bern.

Email template (just fill it in):

Order number: #
Device (brand + model):
Serial number (see nameplate):
Purchased on:
Problem since:

What exactly happens:

What I've already tried (steps from the First Aid page):

Attachments: photo of nameplate / photo or video of the problem

Your statutory warranty and guarantee rights remain unaffected — the first aid steps are voluntary and just a recommendation. Important: if you discover a defect, please let us know promptly.

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