How to Descale Your Espresso Machine (Step by Step)

Scale build-up is the silent killer of espresso machines. Here is how to descale yours safely, how often to do it, and what to use.

Why descaling matters

Every time your machine heats water, minerals (limescale) are left behind inside the boiler and pipes. Left alone, that scale insulates the heating element, throws off your brew temperature, slows flow and eventually causes blockages and failures. Descaling dissolves it and keeps the machine performing — and lasting.

If your shots have started pouring slower, your steam feels weaker, or the machine is noisier than it used to be, scale is a likely culprit.

How often should you descale?

A good default is every 2–3 months — but your water hardness is the real driver:

• Hard tap water — roughly once a month
• Average water — every 2–3 months
• Filtered or softened water — every few months
• Many machines (most Brevilles) flash a descale prompt — follow it

Using filtered water from the start dramatically slows scale build-up and is the single best thing you can do.

What solution to use

• ✅ A dedicated descaling solution — your machine maker's own or a reputable universal espresso descaler
• ✅ Citric-acid-based descalers — gentle on seals and purpose-made
• ❌ White vinegar — lingering taste, harsher on gaskets, and some makers say it voids the warranty
• ❌ Bleach or harsh household cleaners — never

Step by step

1. Empty the drip tray and remove any water filter from the tank.
2. Fill the tank with descaling solution mixed to the bottle's ratio.
3. Run the machine's descale cycle — or, if it has none, run solution through the group head and steam wand in stages, pausing as directed.
4. When the tank empties, refill with fresh clean water and run a full rinse cycle through the group and steam wand.
5. Repeat the rinse once more so no descaler taste remains, then refit the water filter.

Always rinse thoroughly — leftover descaler will taint your next several shots.

Machine-specific notes

• Breville — use the built-in DESCALE mode; it guides you through the brew, hot-water and steam phases.
• Nespresso — enter descaling mode, run one tank of solution through, then two tanks of fresh water to rinse.
• Keurig — fill the reservoir with solution, run brew cycles without a pod until empty, then rinse with several plain-water cycles.

Watch it done

FAQ

Recommended gear

Putting this into practice? Browse our espresso machine reviews and grinder reviews — or start with the Breville Barista Express, our pick for most home baristas.