Daily cleaning keeps your Breville running and your espresso tasting fresh

Clean your Breville espresso machine every time you use it. Espresso leaves behind oils and residue that build up fast and affect the taste of your shots within days. The good news: daily cleaning takes about five minutes and uses only water and a damp cloth. The harder cleaning—backflushing the group head and soaking the basket—happens once a week and takes another ten minutes.

Breville machines come in several models, but the cleaning steps are nearly identical across the Barista Express, Barista Pro, and Bambino. This guide covers all three. If you own a super-automatic model like the Oracle, some steps differ; check your manual for those machines.

Key Takeaways

  • Purge the group head with water when ready after pulling a shot, before the espresso dries and hardens inside.
  • Backflush the group head once a week by running water through it without a basket in place, which forces out trapped oils.
  • Soak the portafilter basket and shower screen in hot water and espresso powder once weekly to dissolve built-up residue.
  • Wipe the steam wand with a damp cloth right after steaming milk, because milk hardens fast and becomes difficult to remove.
  • Run water through the group head without the portafilter once a month to clear the dispersion screen.

Purge and wipe the group head right after each shot

The group head is the part of the machine where the portafilter locks in. Espresso oils dry inside it within minutes and become sticky. Stop this by purging—running water through the group head to flush out loose grounds and oils.

Turn the machine to the water dispense position (consult your manual for the exact button or dial). Hold a small cup under the group head and press the button to run water through for two to three seconds. You will see a thin stream of water and possibly a few grounds come out. Stop when the water runs clear.

Now wipe the group head with a damp cloth or paper towel. Get inside the opening where the portafilter locks in. This removes any remaining moisture and prevents mold. Do this when ready after every shot, before you make another drink or walk away from the machine.

Backflush the group head once a week

Backflushing means running water backward through the group head to blast out oils trapped deep inside. You need a blind basket—a portafilter basket with no holes in the bottom. Breville includes one with most machines. If you cannot find yours, you can order a replacement from Breville's website for about $10 to $15.

Insert the blind basket into the portafilter but do not add any espresso. Lock the portafilter into the group head. Turn the machine to water dispense mode and press the button for one second, then release. You will hear a loud hiss as water shoots back out. Press again for one second, release, and repeat this pulse pattern five to eight times. Water and brown residue will spray out—this is normal and means the backflush is working.

After backflushing, remove the portafilter and run a normal purge (water without the portafilter) for three seconds to clear any remaining residue from inside the group head. Wipe dry with a cloth.

Soak the basket and shower screen weekly

The shower screen is the flat metal disc at the bottom of the group head where water sprays down onto the espresso. The basket sits inside the portafilter. Both trap fine grounds and oils that do not come off with water alone. Soak them once a week in hot water mixed with espresso powder (also called espresso cleaning powder or backflush powder). Cafiza is the most common brand and costs about $8 to $12 per container.

Remove the shower screen by unscrewing it by hand—turn counterclockwise. Remove the basket from the portafilter by pulling it straight out. Fill a small bowl or cup with hot water (not boiling, around 160°F if you have a thermometer, or just very hot tap water). Add one teaspoon of espresso powder and stir until it dissolves into a tan liquid.

Drop the basket and shower screen into the bowl and let them soak for ten to fifteen minutes. Use an old toothbrush to scrub the basket gently, paying attention to the rim where grounds stick. Rinse both parts under running water until the water runs clear and no powder remains. Screw the shower screen back into the group head by hand, turning clockwise until snug—do not overtighten. Let the basket air dry or wipe it with a clean cloth before using it again.

Clean the steam wand when ready after steaming milk

Milk hardens on the steam wand within seconds and becomes nearly impossible to remove if you wait. Clean it right after you finish steaming, before you hand the drink to a customer or take a sip.

Turn off the steam. Wipe the wand with a damp cloth or paper towel while it is still warm. Get the tip and the sides. If milk has already started to dry, soak the cloth in hot water first to soften it, then wipe again. For stubborn dried milk, use an old toothbrush dipped in hot water and scrub gently.

Once a week, remove the tip of the steam wand (it usually unscrews by hand, turning counterclockwise). Soak it in the same espresso powder solution you use for the basket—hot water with one teaspoon of powder, for ten to fifteen minutes. Scrub the inside of the tip with a thin brush or pipe cleaner to clear any milk buildup. Rinse thoroughly and screw it back on.

Run water through the dispersion screen monthly

The dispersion screen sits just above the shower screen inside the group head. Water passes through it on its way down to the espresso. Over time, mineral deposits and fine grounds can clog it, which slows water flow and makes shots pull unevenly.

Once a month, remove the shower screen (unscrew counterclockwise by hand). Look inside the group head—you will see a flat metal screen with tiny holes. Run water through it by turning the machine to water dispense mode and pressing the button for five seconds while the group head is empty. Water should spray out evenly from all holes. If the spray is weak or uneven, the screen needs cleaning.

To clean it, use a soft brush (an old toothbrush works) and gently scrub the screen under running water. Do not use espresso powder on this part—water alone is enough. Screw the shower screen back in when you are done.

Empty and rinse the drip tray weekly

The drip tray sits under the group head and catches water and espresso that drips during shots. Empty it at least once a week, more often if you use the machine daily. A full tray can overflow and damage the machine.

Most Breville machines have a removable drip tray that slides out from the front or side. Pull it out, pour the liquid down the sink, and rinse it under running water. Wipe it dry and slide it back in. If your model has a built-in tray, use a small cup or syringe to remove the liquid.

Descale your machine every three to six months

Descaling removes mineral buildup inside the machine's internal pipes and boiler. Hard water causes faster buildup; soft water means you can go longer between descales. Most users descale every three to six months.

Breville sells a descaling solution in their online store, or you can use a commercial espresso machine descaler like Cafiza or Dripkit. Follow the instructions on the bottle—most require you to fill the water tank with a mixture of descaler and water, then run it through the group head and steam wand into a large bowl until the tank is empty. Then refill the tank with plain water and repeat the process to rinse out all the descaler. This takes about twenty minutes total.

Do not use white vinegar in a Breville machine. Vinegar can damage internal seals and is not recommended by the manufacturer.

Frequently Asked Questions

Can I put the portafilter and basket in the dishwasher?

No. The dishwasher is too hot and too harsh for the metal and seals. Hand wash them in hot soapy water and dry when ready. Leaving them wet can cause rust spots on stainless steel.

What if water does not come out when I try to purge the group head?

The group head may be clogged. Try backflushing with the blind basket five to ten times to clear it. If water still will not flow, the machine may need descaling. Run a full descale cycle and try again.

How do I know if my steam wand tip is clogged?

If steam comes out unevenly or barely at all, the tip is clogged. Soak it in hot espresso powder solution for fifteen minutes, then use a thin pipe cleaner or needle to poke through each hole gently. Rinse and try again.

Do I need to clean the group head if I only make one or two shots a day?

Yes. Purge and wipe after every shot, no matter how many you make. Backflush and soak the basket once a week. The frequency of use does not change how fast espresso oils dry and harden.

What happens if I do not clean my machine regularly?

Espresso will taste bitter or rancid within days. The group head can become so clogged that water will not flow through it at all. Milk buildup on the steam wand can cause rust and permanent damage. Regular cleaning prevents all of this and keeps your machine working for years.