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Our barista trainer Jazmin shares some useful advice on how to clean and maintain your espresso machine. Proper maintenance not only helps extend the life of your equipment but also improves the quality and flavour of your coffee.
Keeping your machine clean is essential, whether you use it at home or in a professional coffee shop.
Before discussing boiler maintenance, it is important to understand that espresso machines can use different heating systems, including single-boiler, heat exchanger and multi-boiler configurations.
Each system works differently and requires specific maintenance according to the manufacturer’s instructions.
Single-boiler machines use one boiler to heat water for brewing and, depending on the design, to produce steam.
In some machines, the same boiler operates at different temperatures for coffee extraction and milk steaming. Other systems use a heat exchanger to heat brewing water separately.
Water quality is particularly important because mineral deposits can accumulate inside the machine, affecting its performance and longevity.
If your espresso machine will remain unused for an extended period, consult the manufacturer’s recommendations for storage and maintenance.
Depending on the model, this may involve cleaning, flushing or draining certain components. Never attempt to drain a pressurised or hot boiler without following the manufacturer’s procedure.
Regular maintenance of the water filtration system is also essential. Old filters, mineral deposits and poor water quality can affect both equipment performance and coffee extraction.
Multi-boiler espresso machines use separate boilers or heating circuits for different functions, such as coffee brewing and steam production.
This configuration allows more independent temperature control and greater stability during extraction.
Although the brewing and steam circuits may be separate, water quality remains important for both systems.
Mineral deposits can accumulate over time, affecting performance and potentially damaging internal components.
For this reason, boiler maintenance, water treatment and any descaling procedures should always follow the manufacturer’s recommendations.
The group head is the part of the espresso machine where the portafilter is attached during extraction.
Coffee residues and oils can accumulate inside the group, affecting water distribution and the flavour of the coffee.
Flushing the group briefly between extractions helps remove loose coffee particles.
The group head, shower screen and other accessible components should also be cleaned regularly according to the manufacturer’s instructions.
In professional environments, daily cleaning is especially important because coffee oils gradually oxidise and can produce unpleasant flavours.
Some machines support backflushing with a suitable espresso machine cleaning detergent. This procedure should only be performed when recommended for the specific machine.
Every coffee extraction leaves small amounts of coffee oils and residues on the filter basket and inside the portafilter.
When these oils come into contact with oxygen, they gradually oxidise and can develop stale or rancid flavours.
Regular cleaning helps prevent this buildup and ensures a more consistent coffee flavour.
Water alone may not remove accumulated coffee oils effectively.
For this reason, it is advisable to use cleaning products specifically designed for espresso equipment and compatible with its materials.
Household products such as vinegar or lemon are not recommended as general substitutes for professional coffee machine cleaners.
Always follow the manufacturer’s instructions regarding the type and quantity of cleaning product.
Cleaning is essential for maintaining espresso equipment, but using unsuitable products or incorrect procedures can damage certain components.
Professional espresso cleaning products are formulated to remove coffee oils and residues when used correctly.
The important thing is to use the recommended dosage, respect contact times and rinse thoroughly.
Portafilters are commonly manufactured from stainless steel or plated brass.
Over time, wear, accumulated residues and unsuitable cleaning practices can affect their appearance.
If the protective plating becomes damaged or begins to peel, the portafilter should be inspected and replaced when necessary.
Regular cleaning with compatible products helps preserve its condition.
Not all portafilters or filter baskets are dishwasher-safe.
Some detergents and high-temperature washing cycles may damage particular finishes or components.
For this reason, manual cleaning with a suitable espresso equipment detergent is generally a safer option unless the manufacturer specifically confirms dishwasher compatibility.
The group gasket is a rubber or silicone seal located inside the group head.
Its function is to create a tight seal between the group and the portafilter, preventing water from escaping during coffee extraction.
Over time, the gasket can become hard, worn or damaged due to heat, pressure and regular use.
A worn gasket may cause leaks around the portafilter and affect extraction.
To prevent these problems, keep the gasket and surrounding area clean and inspect its condition regularly.
Replace it when necessary, following the manufacturer’s recommendations.
A clean espresso machine is essential for preparing consistently good coffee.
Regularly cleaning the group head, portafilter, filter baskets and accessible components helps prevent the accumulation of coffee oils and residues.
Proper water treatment and professional maintenance are equally important for protecting the machine’s internal components.
Taking care of your equipment means better coffee, more consistent extractions and a longer lifespan for your espresso machine.
