What Can You Run Through An Espresso Machine To Clean It

Keeping your espresso machine clean is essential for great-tasting coffee, and knowing what can you run through an espresso machine to clean it makes maintenance much easier. The most common and effective solutions include water, specialized espresso machine cleaning solutions, white vinegar (diluted), and citric acid mixtures. Each option serves different cleaning purposes, from daily flushing to deep descaling. For a complete guide on maintaining your machine, check out this How To Clean Espresso Machine resource.

Why This Matters

Over time, espresso machines accumulate coffee oils, mineral deposits, and residue that affect both taste and performance. These buildup issues can clog internal components, reduce water flow, and create bitter or off-flavored coffee. Running the right cleaning solutions through your machine removes these deposits and extends its lifespan significantly.

Regular cleaning also prevents bacterial growth in warm, moist environments inside the machine. Without proper maintenance, you’re essentially brewing fresh coffee through old, rancid oils—a recipe for disappointing espresso. Understanding which solutions are safe and effective protects your investment while ensuring every shot tastes its best.

Tools & Materials List

• Fresh water (filtered preferred)
• Espresso machine cleaning powder or tablets
• White vinegar (optional, for descaling)
• Citric acid powder (alternative descaler)
• Clean towels or microfiber cloths
• Blind filter basket (for backflushing)
• Measuring cup or spoon
• Container for collecting liquid

Step-by-Step Instructions

For Daily Backflushing with Water:

1. Insert the blind filter basket into your portafilter (a basket with no holes).
2. Lock the portafilter into the group head as if making espresso.
3. Run the brew cycle for 10 seconds, then stop. The pressure will build and flush water back through the system.
4. Repeat this process 5-7 times until the water runs clear.
5. Remove the portafilter and run water through the group head to rinse completely.

For Deep Cleaning with Espresso Cleaner:

1. Add one teaspoon of espresso machine cleaning powder to the blind filter basket.
2. Lock the portafilter into place and run a 10-second brew cycle.
3. Let it sit for 10 seconds, then run another cycle. Repeat 5 times total.
4. Remove the portafilter, rinse the basket thoroughly, and reinsert it (still blind).
5. Run 5 more water-only backflush cycles to remove all cleaning solution residue.
6. Finish by running water through the group head for 30 seconds.

For Descaling with Vinegar or Citric Acid:

1. Empty the water reservoir completely and rinse it out.
2. Mix a descaling solution: either 1 part white vinegar to 2 parts water, or 1 tablespoon citric acid per liter of water.
3. Fill the reservoir with your chosen solution.
4. Run half the solution through the brew head and steam wand as if making coffee.
5. Let the machine sit for 15-20 minutes to allow the solution to break down mineral deposits.
6. Run the remaining solution through the system.
7. Refill with fresh water and run 2-3 full reservoirs through to eliminate all traces of the descaling solution.

Natural Alternatives

If you prefer avoiding commercial cleaners, citric acid is an excellent natural alternative. It’s food-safe, environmentally friendly, and highly effective at removing mineral buildup. Mix one to two tablespoons per liter of water for a gentle yet powerful descaling solution.

Baking soda can work for external cleaning but should never be run through the machine’s internal components, as it can leave residue. For routine maintenance between deep cleans, simply running fresh water through your machine daily helps prevent buildup. Some coffee enthusiasts use cafiza, a biodegradable coffee equipment cleaner that’s less harsh than chemical alternatives while still being highly effective.

Troubleshooting

If your machine still produces weak or slow espresso after cleaning, the shower screen may need removal and soaking. Unscrew it from the group head and soak in espresso cleaner solution for 30 minutes, then scrub gently with a soft brush.

Experiencing persistent mineral buildup? Your water may be too hard. Consider using filtered or bottled water to reduce calcium deposits. If you taste vinegar after descaling, you haven’t rinsed enough—run at least two more full reservoirs of fresh water through the system. For machines with three-way solenoid valves, ensure you’re using the proper backflushing technique, as simply running water won’t clean these components effectively.

Prevention Tips

Prevent major buildup by backflushing with water daily after your last shot. This 2-minute routine removes fresh coffee oils before they harden. Use filtered water to minimize mineral deposits that require descaling.

Perform a deep clean with espresso machine cleaner weekly if you use your machine daily, or monthly for occasional users. Descale every 2-3 months depending on water hardness. Always wipe down the steam wand immediately after frothing milk, and purge it briefly to clear internal milk residue.

Keep Your Machine Running Smoothly

Now you know exactly what can you run through an espresso machine to clean it—from simple water flushes to specialized cleaning solutions and natural alternatives. Regular maintenance with the right products ensures consistently delicious espresso and a machine that lasts for years. Make cleaning part of your coffee routine, and your espresso machine will reward you with perfect shots every time.