How to Get Grease Out of Espresso Machine: Proven 2026 Guide

By Lisa Nguyen · February 24, 2026

Immediate Action (First 5 Minutes)

When you notice that slick, oily film building up on your group head or portafilter, don't panic, but don't ignore it either. Coffee beans naturally contain oils, and over time, those oils go rancid. If you're wondering how to get grease out of espresso machine components before it ruins your morning shot, the first five minutes are critical. I've seen countless home baristas ruin a $2,000 Breville Dual Boiler just by letting coffee oils sit over a long weekend.

First, stop pulling shots immediately. Turn off the machine and let it depressurize. You don't want to start scrubbing while the boiler is still holding 9 bars of pressure. Next, grab a clean, dry microfiber cloth and wipe down the exterior of the group head and the shower screen. This removes the loose, fresh grease before it bakes onto the hot metal. If you have a blind filter basket (the one with no holes), lock it into the portafilter now. This preps you for the backflushing process we'll tackle in the main steps.

I'll be honest, this takes elbow grease if you've neglected it for months. But catching it early saves you from having to disassemble the entire brew head. Keep your machine turned off and unplugged while you gather your supplies. Safety first, especially when we start dealing with hot water and chemical detergents later on.

What You'll Need (Tools and Products)

You don't need a professional technician's toolkit to figure out how to get grease out of espresso machine parts. I've tested dozens of products on my own Rancilio Silvia and Gaggia Classic Pro over the last ten years. Here is the exact loadout I recommend, which will cost you around $25-$40 total if you're starting from scratch.

Espresso Machine Detergent: Urnex Cafiza ($15-$20 for a 20oz tub). Don't use regular dish soap like Dawn; it leaves a perfumed residue that will make your next latte taste like artificial lemons.
Blind Filter Basket: A 58mm or 54mm backflush disc, depending on your machine's portafilter size. This usually costs about $8.
Group Head Brush: A pallo coffeetool or a stiff nylon angled brush ($10). The angled neck is crucial for reaching up into the shower screen without burning your knuckles.
Microfiber Towels: At least three dedicated, lint-free cloths. Keep them separate from your kitchen dish rags.
Food-Grade Silicone Lubricant: Molykote 111 ($12). You'll need this to re-lube the group head gasket after deep cleaning.
Small Flathead Screwdriver & Hex Keys: For removing the shower screen if the grease is severely impacted.

Having these specific items on hand makes the difference between a 15-minute tune-up and a frustrating two-hour teardown. I keep my Cafiza and Pallo brush in a small plastic bin right next to my grinder so I never have an excuse to skip maintenance.

Step-by-Step Removal (The Deep Clean)

Now we get to the actual work. This 6-step process is what I use when I restore used machines I buy off eBay. It's thorough, it's safe for your seals, and it completely strips away rancid coffee grease.

Step 1: The Dry Scrub

With the machine off and cooled down slightly (but still warm to the touch, around 40°C), take your Pallo brush and scrub the group head gasket and shower screen. You'll see dark, gritty coffee grounds and oily sludge start to fall out. Brush this debris down into the drip tray. I usually spend about 2 minutes just dry-brushing to get the bulk of the physical gunk out of the way before introducing any water or chemicals.

Step 2: Chemical Backflushing

Insert your blind filter basket into the portafilter and add exactly half a teaspoon (about 3 grams) of Urnex Cafiza powder. Lock the portafilter into the group head. Turn the machine on and let it reach brewing temperature (usually 93°C). Activate the brew pump for 10 seconds, then turn it off for 10 seconds. The pressure builds up, forces the soapy water up into the machine's internal 3-way solenoid valve, and then violently sucks it back down when you release the pressure. Repeat this 10-second on/off cycle 5 times. You'll hear a loud 'whoosh' when the pressure releases—that's the grease being blasted out of the valve.

Step 3: The Rinse Cycle

Remove the portafilter, rinse out the blind basket, and lock it back in without any detergent. Run the 10-second on/off cycle another 5 times with just plain water. This flushes out the suspended grease and any remaining Cafiza residue. If you skip this, your next espresso shot will taste incredibly bitter and soapy. I always taste the rinse water in a small glass just to be absolutely sure it runs clear and tastes neutral.

Step 4: Shower Screen Teardown

If you're still wondering how to get grease out of espresso machine crevices because the water is still coming out brown, it's time to remove the shower screen. Use your flathead screwdriver to gently pry out the dispersion screw and the screen. Be careful not to strip the screw head. Soak the screen and screw in a mug of hot water mixed with a pinch of Cafiza for 15 minutes. While they soak, take your brush and scrub the exposed brass or steel interior of the group head. You'll be shocked at the black tar-like grease hiding behind that screen.

Step 5: Portafilter and Basket Soak

Don't forget the removable parts. Dissolve one tablespoon of Cafiza in a liter of 80°C water in a plastic tub. Submerge your portafilter handle (keep the plastic or wood grip out of the water if possible, as hot chemicals can degrade the finish over time) and your filter baskets. Let them soak for exactly 20 minutes. The grease will literally melt off the metal. Rinse them thoroughly under cold tap water and dry with a microfiber towel.

Step 6: Reassemble and Re-lube

Rinse the shower screen, reattach it to the group head, and tighten the dispersion screw snugly but don't over-torque it. Now, take a tiny dab of Molykote 111 food-grade silicone grease on your pinky finger and run it along the rubber group head gasket. This isn't strictly for grease removal, but stripping the old oils dries out the rubber. Re-lubing prevents leaks and ensures a perfect seal when you lock in the portafilter. Run one blank shot of water through the machine to prime it, and you're done.

Alternative Methods (When You're in a Pinch)

Sometimes you don't have Cafiza on hand, or you're dealing with a machine that doesn't have a 3-way solenoid valve (like the Breville Bambino or older Gaggia models) which makes traditional backflushing impossible. Here are two backup methods I rely on.

Method 1: The Vinegar and Baking Soda Paste (For Exterior and Drip Trays)

If the grease is mostly on the outside of the machine, the drip tray, or the steam wand, I use a simple DIY paste. Mix two parts baking soda with one part white vinegar until it forms a thick consistency. Apply it to the greasy areas with a soft sponge and let it sit for 10 minutes. The mild abrasion of the baking soda cuts through the oily film without scratching stainless steel. Wipe it away with a damp cloth. Never run vinegar through the internal boiler of a modern espresso machine, though; it can degrade the rubber seals and doesn't effectively break down coffee oils like alkaline detergents do.

Method 2: The Steam Wand Purge (For Milk Fat Grease)

Coffee isn't the only grease culprit. Whole milk leaves behind a stubborn milk fat residue on the steam wand. If you've let it bake on, wrap the wand in a hot, wet microfiber towel for 5 minutes to soften the crust. Then, use a damp sponge to wipe it down. For the internal milk pathways (if you have an automatic milk frother like the Jura E8), run the manufacturer's specific milk system cleaning cycle using their proprietary liquid cleaner. I've tried using generic pipe cleaners for milk systems, and they inevitably clog the tiny thermoblock tubes. Stick to the brand-specific milk cleaners for internal dairy grease.

Prevention Tips

Figuring out how to get grease out of espresso machine parts is a chore you can mostly avoid if you build a solid daily routine. I've managed to keep my machines running flawlessly for over a decade by sticking to these rules.

Daily Water Backflush: At the end of every day, after your last shot, put the blind basket in and run a quick water-only backflush for 10 seconds. This clears the solenoid valve of fresh oils before they harden.
Wipe the Steam Wand Immediately: Never let milk sit on the wand. Purge and wipe it with a dedicated damp cloth the second you finish texturing your milk.
Use Fresh Beans: Dark, oily beans (like traditional Italian roasts) shed significantly more grease into your machine than medium or light roasts. If you love dark roasts, you'll need to chemical backflush every week instead of every month.
Weekly Chemical Clean: Set a recurring alarm on your phone for Sunday morning to do the full Cafiza backflush routine. It takes 10 minutes and saves you hours of deep cleaning later.

FAQ

Can I use dish soap to clean the inside of my espresso machine?

No, you should never use dish soap like Dawn or Palmolive inside the brew group or boiler. Dish soaps are designed to create suds and leave behind perfumes and rinsing agents that will completely ruin the taste of your espresso and are nearly impossible to flush out of the tiny internal valves. Always use an alkaline, low-foaming espresso detergent like Cafiza or Puly Caff.

How often should I actually backflush with chemicals?

If you pull 2 to 4 shots a day at home, a chemical backflush every 3 to 4 weeks is perfectly sufficient. However, if you are running a busy cafe or you exclusively use very dark, oily French roasts, you should be doing a chemical backflush at the end of every single week to prevent rancid oil buildup in the solenoid valve.

Why is my espresso tasting sour and bitter even after cleaning?

If you've thoroughly removed the grease but the coffee still tastes terrible, you likely have scale buildup rather than an oil problem. Coffee oils cause a rancid, sharp, or muddy taste, while limescale causes a sour, hollow, or weak flavor. You will need to run a descaling solution (like Urnex Dezcal) through the boiler to remove mineral deposits, which is a completely different process from degreasing.

Is it safe to take apart the group head on my own?

Removing the shower screen and dispersion block is generally very safe and highly recommended for home users. However, I advise against unbolting the actual brass group head from the boiler or taking apart the 3-way solenoid valve unless you have specific mechanical experience and replacement O-rings on hand, as you can easily cause severe leaks or strip the soft brass threads.