Cleaning and maintenance – Protect the taste and your espresso machine

Protect the taste and your espresso machine

How do you actually keep an espresso machine clean — and why does that have such a big impact on your espresso?

Many home baristas pay close attention to beans, grinding, and extraction.
But one factor is often underestimated: maintenance of the machine itself .

Your espresso can be perfectly tuned, yet slowly start to taste worse as dirt builds up in the machine.

During my first years as a barista, I worked at an espresso bar where machines and coffee grinders regularly came in for service.

What struck me there was remarkable:

In approximately 80% of the cases, the cause was not a defective part, but insufficient maintenance .

Machines arrived with:

• brewing units clogged with old coffee oils
• steam pipes with milk residue
• limescale in pipes
• coffee grinders in which old grease had built up

Not because the machines were bad — but because they were structurally forced to work too hard .

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Why maintenance directly affects your espresso

An espresso machine works with three elements that all cause contamination:

• coffee oils from fresh coffee beans
• milk fats and proteins from frothed milk
• lime from water

Without regular maintenance, these can accumulate in the machine.

You eventually notice that in your cup:

• less fresh taste
• unstable extraction
• less powerful steam
• and parts that wear out faster.

Proper maintenance therefore ensures not only that your machine stays clean — but also that your espresso remains consistent .

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Four maintenance routines for home barista machines

Good maintenance does not consist of a single action, but of a few fixed routines that together ensure your machine stays clean and continues to function properly.

In this module, we look at four important maintenance routines:

• descaling the espresso machine
• cleaning the brewing unit
• cleaning the steam pipe
• cleaning the coffee grinder

Together, these routines form a simple maintenance system that helps prevent loss of flavor, blockages, and technical problems.

These principles are applicable to virtually all semi-automatic espresso machines for home use — from Sage and Ascaso to ECM, Rocket, Rancilio, and La Marzocco .

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What you will learn in this module

In this video module, you will discover how regular maintenance helps keep your espresso consistent and predictable .

You will learn, among other things:

• where contamination forms in an espresso machine
• why coffee oils, milk fats, and lime affect taste and performance
• which parts of your machine and coffee grinder need maintenance
• how a few simple routines help keep espresso consistent
• how good maintenance can prevent wear and tear and expensive repairs.

Proper maintenance is therefore an important part of Espresso Onder Controle .

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This module belongs to the Espresso Under Control series.

This module is part of the Espresso Under Control series — a series of short video modules for home baristas who want to better understand how coffee, extraction, and technique are interconnected.

Each module covers one part of the espresso process, from choosing coffee beans to extraction and maintenance of your machine.

The modules are based on insights from more than ten years of barista workshops by Geert-Jan de Baristaman , in which the same question keeps coming back:

Why does espresso sometimes turn out well right away — and remain difficult with other coffee?

By following the modules step by step, you gain more insight into the choices that influence taste, extraction, and consistency.

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When you know how to adjust your espresso correctly, proper maintenance helps to preserve that quality.

Therefore, this module connects logically to
Module 08 – The three golden rules of espresso .

And when your espresso is stable, you can of course also use it as a base for cappuccino or latte.

You learn that in
Module 10 – Coffee drinks and proportions .

Also view the other modules within Espresso Under Control