Coffee is not just a drink, but a complex emulsion saturated with aromatic compounds and fats. Exactly. coffee-oil They give espresso its recognizable taste and create the very dense foam of cream that gourmets appreciate so much. However, remaining inside the mechanism, these substances quickly oxidize, turning into a sticky, bitter substance that can spoil the taste of even the most expensive grain.
Many owners of automatic and carrot machines neglect regular cleaning, relying only on automatic rinsing programs. That's a fundamental mistake. Water does not dissolve fats, and over time, a dense plaque is formed inside the brewing block, tubes and boiler. Not only does it change the taste profile, making it rancid, but it also creates an ideal environment for bacteria to multiply.
Timely decalcification And removing oils is not just a matter of hygiene, but also of saving. A clogged system requires more pressure from the pump, and the heating elements work with overload. In this guide, we’ll explain why standard water washing isn’t enough, what products are really effective, and how to do a deep cleaning without damaging your device’s delicate mechanisms.
The chemistry of the process: why water can not cope
The main problem lies in the nature of the pollution itself. Coffee oils are hydrophobic substances, meaning they repel water. When hot water under pressure passes through the millstone and the brewing block, it washes out the water-soluble components, but the fats remain on the walls. Over time, they polymerize, forming a hard crust, which is mechanically removed without disassembly is almost impossible.
Oxidation The main enemy of fresh taste. When in contact with oxygen, old oils begin to smell of rancid oil or fish feed. If you notice that your freshly brewed coffee has a strange, unpleasant taste, even though the grain is of good quality, then the system is contaminated. Ignoring this signal leads to the fact that the plaque clogs the thin channels of water supply and valves.
⚠️ Note: The use of ordinary household chemicals for washing dishes (Fairy, Sorti and analogues) is strictly prohibited! These funds form a profuse foam, which is almost impossible to completely wash out of the closed system of the coffee machine. Getting even a microscopic dose of surfactants into a cup can cause serious poisoning.
To combat fats, special reagents are required that can emulsify oils without damaging food plastics and rubber seals. Professional cleaning tablets or powders contain alkaline components and enzymes that break down organic matter. That's why. flushing It should be strictly on the timer, and not at the request of the owner.
It is important to understand the difference between removing scale and removing oils. The scaling (calcium) dissolves with acids, and fats with alkalis. There is no universal means of "two in one" because acid neutralizes the action of alkali and vice versa. Therefore, the maintenance cycle always consists of two stages: first cleaning from oils, then decalcination.
Symptoms of pollution: when it is time to sound the alarm
To determine the critical level of pollution can be not only taste, but also the behavior of the device. The mechanism itself signals problems if you carefully monitor its work. Often users ignore these signs until the machine is finally standing up.
Here are the main signs that hydrosystem requires immediate intervention:
- 📉 The pressure in the system fell: the stream of coffee became sluggish, intermittent or disappeared completely, although the millstones are tuned correctly.
- 👃 There was a persistent smell of old, rancid oil, which is felt even when the car is turned off in the pallet area.
- 💧 Change in cream color: The foam has become pale, settles quickly, or has an uneven structure with large bubbles.
- 🔊 The pump works with increased noise or humming, trying to push water through clogged channels.
Especially carefully should be treated to the state of the brewing block in automatic coffee machines. If you extract it for hand washing and you see it covered in a sticky, dark brown, almost black coating that doesn't get washed away by warm water - that's an already neglected case. In such situations, a single wash may not be enough, a cycle of 2-3 cleanings with a double dosage of the product will be required.
It is also worth paying attention to the color of the flowing water at the idle strait. Ideally, it should be transparent. If after several straits the water continues to have a brown hue, then a significant amount of suspension and oils have accumulated in the tubes and boiler. This is a direct indication for use. cleaning-pill.
Choice of cleaning product: tablets, defects or liquids?
The market offers many options for servicing coffee equipment. From original branded products to cheap analogues. The main criterion of choice is the safety of materials and the effectiveness of fat breakdown.
The most popular pill-cleaning. They are convenient in dosage and often already contain an indicator of the end of the reaction (hisping). Powders are good because they allow you to flexibly change the concentration of the solution, which is useful for severe contamination. Liquids are more often used for soaking removable parts or in professional washing machines.
Comparison of popular cleaning product formats:
| Type of instrument | Efficiency | Convenience | Risk of overdose |
|---|---|---|---|
| Pills. | Tall. | Maximum. | Minimum |
| Powder | Medium/High | Average. | Medium. |
| Fluid | Tall. | Low. | High-pitched |
When choosing, be sure to check the composition. A good product should not contain chlorine and aggressive oxidants that destroy rubber seals (O-ring). Original funds Coffee machine manufacturers (DeLonghi, Saeco, Jura) often cost more, but are guaranteed to be safe for a particular model. Analogues can be effective, but require caution.
Technology of automatic coffee machine washing
The process of cleaning automatic models (DeLonghi, Philips, Nivona) is usually regulated by the firmware. The machine will tell you when it is time to start the process, flashing the corresponding indicator. However, it is important to understand the physical meaning of what is happening in order to control the quality.
The first step is always to empty the pallet for drops and the cake container. Then, clean water is poured into the water tank and a cleaning agent is added according to the instructions (usually 1-2 tablets or a measuring spoon of powder). Do not use hot water to dissolve the tablet directly in the tank, unless it is indicated in the instructions - it is better to let it dissolve in a separate container.
The cleaning program is then started. The machine will start to run the solution through the brewing block and internal tubes. At this point, a chemical reaction occurs: the alkali breaks down the fats, and they pass into the emulsion. It is important not to interrupt this process. If the machine requires the extraction and washing of the brewing block in the middle of the cycle, do so, but return it as soon as possible.
☑️ Automatic cleaning algorithm
After the cycle is completed, the machine usually goes into clean water washing mode. This is a critical phase. Make sure that all the chemical residues are washed out. To do this, it is recommended to pour 3-4 cups of hot water without coffee through the group, pouring them each time. Only after that can you make a drink.
For models with a removable brewing unit (for example, Saeco or Philips) it is recommended to remove the mechanism once a month and wash it with warm water without detergents, removing the coffee residues with a soft brush. Lubricate moving parts only with a special food lubricant, and only if it is provided by the instructions (many modern blocks do not need to be lubricated).
Cleaning of carob (carob) coffee machines
Owning a carob machine (Gaggia, Rancilio, Lelit) requires a more manual approach. There are no automatic cycles, so the responsibility for cleanliness lies entirely with the barista. The main method here is "blind" washing (backflushing).
For this purpose, a special "blind" filter (without holes) or a disk for washing is used. In the basket of the holdinger (horn) put cleaning agent (usually Cafiza powder or its analogues), the holdinger is inserted into the group and the water supply is turned on for 5-10 seconds. The water is then turned off and pressure is created that causes the water to go back through the holes in the dispersion shower group, washing out the plaque.
⚠️ Warning: Never backflush on machines without a three-way valve! This is typical for the most budget models. If you are not sure if you have a three-way vehicle, consult the manual. Pressure can damage the pressure gauge or pump.
The cycle is repeated 5-7 times: turned on the water for 5 seconds, turned off for 5 seconds. Then the procedure is repeated without chemistry, only with clean water to wash away the residues of the product. After that, you need to remove the dispersion screen (shower) and thoroughly clean it with a brush, since there accumulates the most oils.
How often do I do a reverse wash?
For home use with an intensity of 3-5 cups a day, it is enough to carry out backflushing with chemistry once a week. If you are preparing milk drinks, you should do it more often - every 3-4 days, as milk accelerates the contamination of the group.
Don’t forget the outside of the group. Wash it with a wet cloth after each series of straits. The accumulated plaque on the outside can get into the cup when installing the horn. Regular mechanical brushing significantly prolongs the intervals between chemical cleanings.
Frequent Mistakes and Myths About Caring for Coffee Machines
Around the maintenance of coffee equipment there are many myths that can lead to the breakdown of expensive equipment. We will discuss the most common misconceptions so that you do not harm your device.
One of the most popular myths is the use of citric acid or vinegar to remove oils. It's absolutely useless. Acids perfectly dissolve calcium deposits (scale), but they do not affect fats. Moreover, frequent use of aggressive acids can eat away at aluminum alloys and rubber seals inside the machine.
Another mistake is to ignore the quality of water. The use of high-hardness tap water accelerates the formation of scale, which “preserves” coffee oils inside porous scale structures. It is a mixture of fat and stone that is extremely difficult to remove. Using filtered or bottled water reduces the frequency of service required.
Use distilled or osmotic water only if your machine has a water (mineralization) sensor. In simple machines without sensors, such water may not be detected by the pump, and the machine will not turn on.
It is also a mistake to assume that if a machine is making coffee, it is clean. As we have already found out, the taste changes gradually, and the owner gets used to the deterioration of quality without noticing the problem. Regularity is a key factor. It is better to wash more often, but with smaller doses of chemistry than to arrange rare "shock" therapy.
Table of service frequency
To systematize care, it is useful to stick to a schedule. The frequency of the procedures depends on the intensity of use (the number of cups prepared) and the hardness of the water.
| Procedure | Frequency (Home) | Frequency (Office/Café) | Expendables |
|---|---|---|---|
| Water washing of the group | Every day. | After each episode | Water. |
| Oil cleansing | Every 2-3 weeks | Once a week. | Tablets/Powder |
| decalcination | By signal / 2-3 months. | Once a month | Decalcinator |
| Replacement of water filters | Every 2 months | Once a month | cartridge |
Keeping this schedule will allow your coffee machine to last for years without repairs. Remember that the cost of maintenance (tablets and filters) is disproportionately less than the cost of replacing a boiler or a brewing unit.
Regular prevention is cheaper than major repairs. Skipping oil cleaning for 2-3 months can cause irreversible damage to the internal tubes and pumps.
Questions and Answers (FAQ)
Can I wash the block in the dishwasher?
Absolutely not. High temperature and aggressive detergents in the dishwasher deform plastic parts and wash off special food lubricant from the guides. Wash only with warm water by hand.
What does a properly cleaned coffee machine smell like?
It shouldn't smell like anything. The absence of coffee or chemistry is the main sign of cleanliness. If after washing you feel the smell of the pill, rinse the system 2-3 times with clean water.
What to do if the coffee becomes sour after cleaning?
Probably, the system left residues of cleaning agent (alkali), which react with coffee. It is necessary to perform a full cycle of washing with clean water (without a tablet) 2-3 times until the taste is stabilized.
Can I use soda instead of special pills?
Not recommended. Baking soda can leave a sludge that clogs fine channels, and its alkaline activity is not high enough to effectively break down polymerized coffee oils at low temperatures.
How often do you change water filters?
The standard life of the cartridge is about 50 liters or 2 months of use. If the water is too hard, change it more often. Ignoring filter replacement negates the effectiveness of decalcination.