Sep 28, 2024

How to clean espresso machine shower screens

Cleaning the shower screen of your espresso machine is an essential part of regular maintenance to ensure consistent water flow and optimal espresso extraction. Over time, oils, coffee particles, and minerals can build up on the screen, leading to inconsistent water distribution. Here's a step-by-step guide to properly clean your espresso machine's shower screen:

1. Regular Rinsing After Each Use

After pulling each shot, run water through the group head for a few seconds to rinse off coffee grounds and oils. This helps prevent buildup from hardening over time.

2. Backflushing with Water (Daily)

Insert a blind filter (a portafilter basket with no holes) into the portafilter.
Run the machine for 5–10 seconds, and then stop. Repeat this a few times.
This flushes out loose particles and oils from the shower screen and solenoid valve. Doing this regularly helps prevent buildup.

3. Backflushing with Cleaner (Weekly)

Use an espresso machine detergent like Cafiza or any similar product.
Place the blind filter in the portafilter and add a small amount of the cleaner.
Insert the portafilter into the group head and activate the pump for 10 seconds, then stop. Let it sit for 10 seconds, and repeat this process 3–5 times.
Afterward, flush with clean water multiple times to ensure all detergent is removed.

4. Removing the Shower Screen (Monthly or When Needed)

Turn off the machine and ensure it has cooled down to avoid burns.
Remove the portafilter and locate the screw holding the shower screen in place. Use a screwdriver to unscrew it.
Remove the shower screen and soak it in hot water mixed with espresso machine cleaner for 15–30 minutes to break down coffee oils and debris.
Scrub the screen gently with a soft brush or a used toothbrush to remove any remaining particles.
Clean the area behind the shower screen in the group head using a brush to remove any buildup.
Rinse the shower screen thoroughly, dry it, and reassemble it by screwing it back into place.

5. Deep Cleaning (Quarterly or Annually)

Depending on your machine's usage, a more thorough cleaning of internal components like the group head gasket and dispersion plate may be needed.
Disassemble the group head following the manufacturer’s instructions, clean each part, and replace gaskets or seals if worn out.

6. Final Rinse and Test

After cleaning, run a few shots of water through the machine without coffee to ensure there’s no cleaner residue left and that the machine is operating smoothly.

Tools and Products You May Need:

Blind filter or blank portafilter basket.
Espresso machine cleaner (such as Cafiza or Puly Caff).
A screwdriver (for removing the shower screen).
A small brush or toothbrush (for scrubbing the screen).
A towel for drying the parts.

Important Tips:

Frequency of Cleaning: How often you should clean the shower screen depends on how much you use your machine. If it's in daily use (especially in a commercial environment), aim to clean it thoroughly weekly or biweekly. For home use, monthly deep cleaning is generally sufficient.
Check Manufacturer’s Instructions: Every espresso machine model may have slightly different parts and cleaning procedures, so consult the manual for specific instructions.

Regular maintenance ensures better espresso shots and extends the life of your machine, making it an essential part of any espresso routine.