How to Descale Breville Coffee Machine

Last Edited: 19/03/2026

If your coffee tastes off or your Breville machine feels slow, the scale is usually the reason. Mineral buildup affects temperature, pressure, and flow, and it shortens the life of the machine. This guide shows you how to descale a Breville coffee machine step by step, how to clean an espresso machine properly, and the easiest ways to keep yours running well.

Why Descaling Matters

Minerals from tap water collect inside the boiler and lines. Over time, you get:

• Weak or uneven coffee
• Slow water flow
• Noisy pump
• Higher energy use
• Risk of blockages or breakdowns

Breville machines rely on tight temperature and pressure control. When scale forms, heating becomes inconsistent, and pumps work harder than they should.

What actually causes this

Minerals coat the heating element and narrow the water channels. The machine has to push harder to get the right pressure, and the temperature drops. That’s why shots start tasting flat, sour or bitter even if your beans are fine.

How to Descale Breville Coffee Machine

This guide covers common Breville models like the Barista Express, Barista Pro, Barista Touch, Bambino Plus, and Oracle.

What you need

• Breville descaling solution or an espresso-machine-safe descaler (usually citric acid-based)
• Large container
• Fresh water

Steps

Empty the machine

Take out the portafilter, remove any coffee grounds, and empty the water tank.

Mix the descaling solution

Add the descaler to the tank and fill with water according to the instructions. Avoid vinegar. Breville recommends proper espresso-machine descalers because vinegar can leave residue, affect taste, and damage seals or metal parts over time.

Run the descale cycle

Breville espresso machine models have a descale mode, but the button combination depends on the model and the built-in descaling process programmed into the machine, so prepare the machine and enter descale mode according to your model.

For example, the Bambino Plus enters descale mode by holding the 1 CUP and STEAM buttons for several seconds to begin the descaling cycle.

Check your model’s manual or on-screen prompts, as indicator LED lights or display notifications usually signal when it is time to start descaling and confirm the machine is ready.

Flush the system

Run the solution through both the brew head and the steam wand until the tank is empty, and watch the flow as it runs through each outlet to perform the descaling run properly.

Rinse

Refill the tank with fresh water after descaling  and run a full tank through again to clear any remaining descaler, then repeat if any solution remains.

Clean the steam wand

Purge the wand and wipe it so no descaler residue dries inside the tip.

How often to descale

You should descale a Breville coffee machine every 1 to 3 months intervals, based on the machines descale warning, water hardness, and:

• How often you use the machine
• Whether you use a water filter

In very hard-water areas or with heavy daily use, monthly descaling is reasonable.

How to Clean Any Coffee Machine

Descaling removes mineral buildup. Cleaning removes oils, milk residue, and coffee particles. You need both.

Daily

• Empty and rinse the portafilter or filter basket
• Purge the steam wand
• Wipe down the machine
• Empty the drip tray

Weekly

• Wash the water tank
• Clean the group head or brew basket
• Do a clear-water backflush after each session if your Breville model supports it
• Use cleaning tablets weekly or fortnightly (cleaning tablets remove coffee oils, not scale)

Monthly

• Deep clean the drip tray and waste bin
• Check the steam wand tip for blockages
• Clean grinders and hoppers (Breville grinders usually just need a gentle brush out)

How Often Should You Clean vs Descale

Signs Your Machine Needs Attention

You may find these changes before the warning appears:

• Coffee tastes bitter or sour
• Water flow is slower than usual
• Milk texturing takes longer
• The machine sounds louder
• Shot temperature feels inconsistent
• Shots run faster or slower than normal
• On many newer Breville machines, you’ll see a DESCALE or CLEAN / DESCALE message or indicator light a clear sign that it’s time.

Troubleshooting

Descale light won’t turn off

Some Breville models need you to complete both the brew and steam stages of the descale cycle before the light resets. Missing one stage keeps the alert active.

Won’t enter descale mode

The water tank may not be seated properly, or the button combo might need to be held longer than you expect. On touchscreen models, the descale option can be buried in the menu, so place the water tank firmly back in position before trying again.

Flow still slow after descaling

Loose scale can still build in the system after the first cycle, or move through it, so another rinse may help flush everything out. Run a second rinse with fresh water, or warm water if your machine instructions allow it. If the flow is still restricted, the steam wand tip may also need cleaning.

Simple Ways to Keep Your Machine Cleaner for Longer

• Use filtered water when possible; it's important for reducing scale between descales
• Empty the tank before going away
• Rinse the portafilter right after pulling a shot
• Purge the wand every time you heat milk
• Keep the grinder dry and free of oils
• Many Breville espresso models use ClaroSwiss water filters. Replace them roughly every 90 days or as your machine recommends, helping over the years by limiting buildup and ensuring more consistent performance.

FAQs

Can I descale with vinegar?

Technically, you can, and plenty of people do, but it’s not recommended. Vinegar leaves a strong smell, affects taste, and can shorten the life of seals and metal parts. Use an espresso-machine-safe descaler instead., such as the Breville 1L Eco Liquid Descaler.

Can I use a generic descaler?

Yes, as long as it’s made for espresso machines. For the safest option, use Breville’s own descaler or a reputable coffee-machine brand. You'll find a full range of compatible options in our Coffee Accessories collection.

How long does descaling take?

Most Breville machines take around 20 to 30 minutes, including the rinse cycle.

Do I need to descale if I use filtered water?

Yes. Filtered water slows scale buildup but doesn’t stop it. You still need to descale, just less often. If you need a replacement for your machine's water filter, our Water Filtration range covers options for keeping mineral buildup down between descales

Final Thoughts

Keeping your coffee machine clean is the easiest way to keep flavour consistent and protect the appliance long term. If you follow these steps for how to descale a Breville coffee machine and stick to a regular cleaning routine, your machine will run smoothly, and your coffee will taste the way it should.