Daily cleaning keeps your Chefman running and your espresso tasting right

Clean your group head (the part where the portafilter locks in) when ready after each shot by running water through it without the portafilter attached. Wipe the shower screen with a damp cloth. Empty the drip tray and knock out the used grounds from your portafilter into a trash bin, then rinse the portafilter and basket under running water. These five-minute steps prevent old coffee oils from building up and affecting the taste of your next drink.

The steam wand needs attention right after you steam milk. Purge it by pressing the steam button for two seconds to push out milk inside the tube, then when ready wipe the outside with a damp cloth while it is still warm. Milk that dries on the wand hardens and becomes difficult to remove later. If you forget and it hardens, soak the wand in hot water for ten minutes before wiping.

Key Takeaways

  • Backflush your group head twice a week by locking in an empty basket and running water through it for two seconds, then releasing, to clear oils that daily rinsing misses.
  • Soak your portafilter and baskets in hot water with espresso machine cleaning powder once a week to dissolve built-up coffee residue inside the basket holes.
  • Descale your Chefman every two to four weeks depending on your water hardness by running the descaling solution through the group head and steam wand, then flushing with fresh water.
  • The water tank should be emptied and rinsed every few days to prevent mold and mineral buildup inside the reservoir.

Backflushing removes oils that rinsing alone cannot reach

Backflushing forces water backward through the group head to dislodge coffee oils and fine grounds stuck in the shower screen and dispersion plate. Insert an empty basket (no grounds, no portafilter screen) into your portafilter and lock it into the group head. Press the brew button for two seconds, then release it. Repeat this cycle five to seven times until water runs clear.

Do this twice a week if you use your machine daily. Backflushing is what separates machines that taste good for months from machines that taste stale after two weeks. Your Chefman's group head will clog with oils otherwise, and no amount of rinsing will fix it. If your machine does not have a three-way solenoid valve (check your manual), backflushing may damage the pump—in that case, skip this step and rely on soaking instead.

Soaking baskets and portafilters dissolves stubborn residue

Once a week, fill a cup with hot water and add one teaspoon of espresso machine cleaning powder (brands like Cafiza are common and inexpensive). Drop your portafilter and baskets into the cup and let them soak for fifteen to twenty minutes. The powder breaks down dried coffee oils and residue inside the basket holes that you cannot reach with a brush.

After soaking, scrub the basket with an old toothbrush or a small brass brush to loosen any remaining particles, then rinse thoroughly under running water. Soak the shower screen the same way if it looks discolored or has visible buildup. Do not soak the portafilter handle if it is wooden—soak only the metal basket and the metal parts of the portafilter.

Descaling removes mineral buildup from inside the machine

Descaling dissolves mineral deposits left by water inside your boiler and pipes. Every two to four weeks (more often if you have hard water), fill your water tank with a descaling solution mixed according to the bottle instructions—usually one part descaler to ten parts water. Run the solution through the group head by pressing the brew button for ten seconds, then releasing for ten seconds, and repeating until the tank is empty.

Next, run the solution through the steam wand the same way: press the steam button for ten seconds, release for ten seconds, repeat until empty. Let the machine sit for fifteen minutes with the solution inside. Then empty the tank, refill it with fresh water, and flush the group head and steam wand again by running fresh water through them for one minute each. This removes all traces of descaler, which tastes bitter if left behind.

If your Chefman has a descaling light or indicator, follow the manual's instructions for that model. Some machines have a specific descaling mode that automates the process.

The water tank and reservoir need regular emptying

Empty your water tank every two to three days and rinse it under running water. Stagnant water in the tank grows mold and mineral deposits, which then flow into your espresso. If you see green or brown discoloration inside the tank, soak it in hot water with a small amount of white vinegar for thirty minutes, scrub with a bottle brush, and rinse well.

If your Chefman has a removable drip tray underneath the group head, empty it after every use. Water sitting in the tray can splash back onto the machine or create a breeding ground for mold if left for days.

Cleaning the shower screen and dispersion plate

The shower screen (the flat metal piece with small holes above where your portafilter locks in) collects dried coffee residue. Soak it in your cleaning powder solution for fifteen minutes once a week, then scrub gently with a soft brush and rinse. Do not use a hard brush or steel wool, which can scratch the screen and damage the holes.

Some Chefman models have a removable dispersion plate behind the shower screen. Check your manual to see if yours does. If it does, remove it once a month, soak both pieces together in cleaning powder solution, and scrub gently before rinsing and reinstalling. Reinstall the dispersion plate first, then the shower screen, making sure both sit flat.

What to do if your machine stops flowing or tastes off

If water stops flowing through the group head or flows very slowly, your machine is clogged with mineral buildup or old coffee oils. Run a full descaling cycle first. If that does not fix it, backflush five more times than usual. If the machine still does not flow, the boiler itself may be blocked—contact Chefman support, as this usually requires professional cleaning or a replacement boiler.

If your espresso tastes bitter or stale even with fresh beans, your group head or shower screen is coated with old oils. Backflush daily for a week, soak your basket and portafilter in cleaning powder, and descale. These three steps together will restore the taste. If the taste does not improve, your machine may need a deeper cleaning that requires disassembly—again, contact Chefman support.

Frequently Asked Questions

Can I use vinegar to descale my Chefman instead of espresso machine descaler?

Vinegar works but leaves a smell and taste that lingers even after flushing. Espresso machine descaler is designed to dissolve minerals without leaving residue. For the cost difference, descaler is worth it. If you must use vinegar, use white vinegar only and flush with fresh water for at least two minutes afterward.

How often should I replace the shower screen?

A shower screen lasts one to two years with regular cleaning. Replace it sooner if you see deep scratches, cracks, or holes that have enlarged. A damaged screen causes uneven water distribution and poor espresso quality. Replacement screens are inexpensive and available from Chefman or online retailers.

What if water leaks from the group head during backflushing?

Small drips are normal. If water sprays out forcefully, your empty basket may not be seating properly in the portafilter, or the portafilter itself may not be locked in tightly. Lock it in firmly and try again. If leaking continues, the group head seal may be worn and may need replacement.

Is it safe to backflush if my machine is still hot?

Yes. Backflush while the machine is hot—the warm water helps dissolve oils better. Let the machine heat for at least five minutes after turning it on before you backflush. Never backflush when ready after turning the machine on, as the group head may not be hot enough yet.

Can I clean the inside of the boiler myself?

No. The boiler is sealed and requires disassembly by someone trained on your specific model. Descaling through the group head and steam wand cleans the pipes and boiler without opening it. If mineral buildup blocks water flow completely, contact Chefman support rather than attempting to open the machine yourself.