How Does Washing Coffee Machines Extend Their Lifespan?

An espresso machine that goes without maintenance shows falling extraction quality and can eventually break down. Key parts need regular care: the dispersion screen at the bottom of the group head, the steam wand, and the portafilter spout area. After each shot, residue oils and fine grounds cling to the screen and get baked solid by the hot group head, interfering with later extractions.

Rinsing with hot water after every extraction handles the light cleaning, while deep backflushing clears buildup inside. The steam wand needs its surface wiped and its tip soaked, and the spout area should be cleaned on a routine. A coffee enthusiast can follow the same logic across most machines, since the cleaning steps are largely universal and extend machine life while avoiding repairs.

If a home espresso machine lacks maintenance for a long time, extraction quality will gradually decline and may even cause malfunctions. This article uses practical operations as examples to systematically explain cleaning methods for each key part of the coffee machine. The content covers the simple rinsing and deep backflushing process for the dispersion screen, techniques for wiping the steam wand surface and soaking the tip, and key points for cleaning the portafilter spout area. Through regular maintenance, the machine’s lifespan can be effectively extended and costly repairs avoided. The steps in the article are clear and suitable for coffee enthusiasts to follow on their own.

If an espresso machine is not properly maintained for a long time, various problems often appear after a period of use, directly affecting extraction results. It is clear that daily maintenance plays a decisive role. Today Front Street Coffee will talk with everyone about which parts of the coffee machine need regular care.

Although the model used for demonstration in this article is the small commercial espresso machine in Front Street Coffee’s store, the cleaning logic of most coffee machines is largely the same, so this cleaning process can basically be used universally.

1. Cleaning the dispersion screen

The dispersion screen is located at the bottom of the group head. When looking up at the group head from below, it is the first thing you see. During extraction, the dispersion screen comes into direct contact with the coffee grounds. When the pressure reaches a certain level, hot water passes through the dispersion screen, carrying the essence of the coffee downward as it drips into the cup. After extraction is finished and the valve is closed, the coffee liquid that has not yet seeped out is “sucked back” upward.

Although these residual liquids are quickly drained away, some oils and fine grounds still adhere to the dispersion screen. If they are not cleaned in time (as shown in the picture above), coffee particles and oils will be baked and solidified by the high temperature of the group head, and over time this will negatively interfere with extraction. Therefore, we need to clean the dispersion screen to different degrees according to different timing.

Simple cleaning: After each extraction is completed, you can open the water valve and release a small amount of hot water, using the water flow to wash away coffee grounds and oils on the dispersion screen. When the number of extractions accumulates to a certain amount, use a cleaning brush to scrub the dispersion screen carefully. After all, hot water alone cannot completely remove residue and oil buildup; physical friction is still needed to wash it clean.

Deep cleaning: When closing down for the day and preparing to turn off the machine, the inside of the dispersion screen needs to be cleaned. No matter how hard you scrub with a brush, you can only reach the surface of the dispersion screen; the dirt accumulated inside remains. At this point we need to replace the filter basket with a blind basket that has no holes, add about 2–3 grams of special espresso machine cleaning powder, lock it onto the group head, and begin cleaning the interior of the dispersion screen.

The method is to open the valve. Because the blind basket has no holes, the hot water circulates repeatedly inside the machine. After about 15 seconds, close the valve, and the coffee machine will draw the cleaning solution from the blind basket into the pressure release channel and discharge it, thereby cleaning the interior. Repeat this 3–5 times. Throughout the process there is no need to remove the portafilter, nor to add more cleaning powder. The reason for not flushing continuously for one minute is to avoid damaging the pressure release valve from prolonged operation.

After backflushing is finished, remove the portafilter and release water once more. If you are diligent, you can also brush it again, and the cleaning is complete. (Remember to discard the first shot of espresso pulled when the machine is turned on the next day.)

2. Cleaning the steam wand

The steam wand is an extremely important functional part of an espresso machine. Making hot milk coffee is impossible without it, so its maintenance must not be neglected either. Its cleaning is also divided into two levels: simple and deep.

Simple cleaning: After steaming milk foam, milk residue remains both on the surface and inside the steam wand. If it is not dealt with immediately, within just a few seconds the milk will be dried by the high-temperature steam wand and stick firmly to the inner and outer walls, making it much harder to clean later.

So after steaming is finished, immediately wipe away the milk residue on the surface with a clean damp cloth (you can keep a dedicated cloth for wiping the steam wand), then release steam for 1–2 seconds to expel the milk remaining inside.

Deep cleaning of the tip: Since simple cleaning is called simple, it naturally has places it cannot reach, such as inside the holes of the steam wand tip. There are dead angles deep inside the holes, and steam release cannot reach the milk residue there either. Therefore, also when turning off the machine or closing shop, you can remove the tip, find a container, add cleaning powder and hot water, and soak the tip overnight. The next day, rinse it clean.

Deep cleaning of the steam wand: Since you have washed the tip, the steam wand itself should not be ignored either. Find a cup of suitable height, add cleaning powder and hot water, soak overnight, and the next day when turning on the machine, release steam for a few minutes and cleaning is complete.

(You can also soak the tip and steam wand together.)

3. Cleaning the portafilter

Many people use a portafilter with a split-flow design for extraction, and the spout area also has many dead angles. If it is not cleaned regularly, it will give off an unpleasant odor. So cleaning the portafilter must not be forgotten either.

Prepare a container that can hold the entire portafilter head, add an appropriate amount of cleaning powder and enough hot water to submerge the portafilter head, and soak overnight. The next day, take it out and rinse it clean.

The above are the parts we can clean ourselves. When these places are maintained regularly, the espresso machine can remain in good condition and the probability of malfunction can be reduced. If a major problem is caused by untimely cleaning, then when it is sent for repair, it will cost a considerable amount in maintenance fees.

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Front Street Coffee

No. 10 Baoqian Street, Yandun Road, Dongshankou, Yuexiu District, Guangzhou, Guangdong Province

The above content is compiled by CoffeeHunters, a coffee news website.