Sooner or later, every owner of a coffee maker faces this problem: the machine begins to work more slowly, the drink loses its rich aroma, and a barely warm stream drips from the spout. These are sure signs that limescale has formed inside, which is blocking the normal passage of water. If you ignore these signals, you can end up with expensive repairs or complete replacement.
The water we use to make espresso or Americano contains calcium and magnesium salts. When heated, these salts precipitate, forming solid deposits on the heating element, in tubes and valves. Decalcification is the process of removing these deposits using special chemical solutions or available home remedies. Regular maintenance prolongs the life of the device and preserves the taste of your favorite drink.
In this article, we will look in detail at how you can safely wash a coffee machine, which products are absolutely not suitable for this purpose, and how to carry out the procedure correctly so as not to damage the internal components. You will learn about the differences between professional chemistry and traditional methods, and also receive a step-by-step algorithm of actions for carob, capsule and automatic models.
Why is it necessary to descale and how does it affect the taste?
Scale is not just a white coating on the bottom of the kettle, it is a serious threat to the complex hydraulic system of the coffee machine. The lime layer has low thermal conductivity, which means the heating element requires more time and energy to heat the water to operating temperature. This leads to heating element overheating and its premature failure.
In addition, narrowing of the ducts due to deposits reduces the pressure in the system. To prepare high-quality espresso, you need a pressure of 9 bar, but a machine clogged with scale simply cannot provide it. The result is a watery, sour drink without the characteristic foam of cream, regardless of the quality of the beans used.
It is also worth noting the impact on the hygienic condition of the device. The rough surface of lime deposits is an ideal breeding ground for bacteria and mold. Even if you use fresh water, passing through dirty pipes, it becomes saturated with foreign microorganisms. Regular flushing is a matter of not only saving on repairs, but also health safety.
- 📉 Reduced pump pressure and worsened coffee extraction.
- 🔥 Overheating and burnout of the heating element.
- 🦠 Reproduction of bacteria in hard-to-reach places in the system.
- 🔊 Increased noise level when the device is operating.
⚠️ Attention: If your coffee machine makes a humming sound when trying to dispense steam or water, but no liquid comes out, this may indicate that the tubes are completely blocked by scale. Immediately stop attempting to turn on and begin decalcification.
Modern automatic models are often equipped with indicators that signal the need for a cleaning procedure. However, you shouldn't rely on electronics alone: if you use hard water, the intervals between services may be shorter. Visual inspection of the jet and tasting the drink are the best indicators of the condition of your equipment.
Professional decalcification products: is it worth buying?
Coffee machine manufacturers such as DeLonghi, Saeco, Philips and Bosch, produce their own lines of cleaning products. Many users are wondering: is it really necessary to overpay for branded bottles, or can you get by with more affordable analogues? Professional chemistry is developed taking into account the materials used in specific models of equipment.
The main advantage of specialized solutions is their balanced composition. They contain acids (most often sulfamic or lactic) in a concentration that effectively dissolves calcium carbonate, but is not aggressive to rubber seals, plastic tubes and metal parts. Using the wrong acid may result in metal corrosion or softening of rubber.
In addition, many branded products contain anti-corrosion additives and components that prevent re-deposition of salts immediately after washing. Liquid concentrates are more convenient to use, as they are easy to dose, and effervescent tablets are often used to clean coffee oils from the brewing unit, which is also an important part of care.
When choosing a product, pay attention to its release form. Liquid concentrates allow you to quickly prepare the required volume of solution, while tablets take time to dissolve and may leave a residue if the water is cold. For automatic machines with a built-in self-cleaning system, it is better to choose exactly those products that are recommended in the instructions for a particular model.
The secret of the composition of professional products
Unlike household chemicals, products for coffee machines do not contain chlorine and phosphates. The basis is organic acid, which acts softer than hydrochloric or phosphoric acid, but is more effective against carbonate deposits. Corrosion inhibitors are also added to protect the brass and steel elements of the boiler.
Homemade Alternatives: Citric Acid and Vinegar
If there is no special remedy at hand, many turn to proven folk methods. Citric acid is the most popular and safest option. It is sold in any grocery store, costs a penny and does not have a strong odor. To prepare the solution, usually use 10-20 grams of powder per 1 liter of warm water.
Acetic acid is also effective against scale, but requires more caution. Regular table vinegar (9%) must be diluted with water in a ratio of 1:3 or 1:4 so as not to damage the internal parts. The main disadvantage of vinegar is its persistent odor, which can linger in the car for a long time and be transferred to the coffee, spoiling its taste.
There is an opinion that citric acid is less effective against old scale compared to professional products based on sulfamic acid. However, it is ideal for preventative cleaning once every 2-3 months.
- 🍋 Citric acid: safe, available, odorless.
- 🧪 Vinegar: effective, but requires careful rinsing.
- 💧 Distilled water: prevents the formation of new scale.
⚠️ Attention: Never use hydrochloric or sulfuric acid, or descaling products in toilets or plumbing fixtures. They contain harsh inhibitors and additives that can be toxic if ingested and will destroy the food-grade plastics of the coffee machine.
When using home remedies, it is important to strictly follow the proportions. Too concentrated a solution of citric acid can make the plastic brittle, and too much vinegar can corrode rubber gaskets. After a procedure using any acidic solutions, it is necessary to carry out a rinse cycle with clean water at least 2-3 times to remove any remaining reagent.
Step-by-step instructions: how to clean a carob coffee machine
Carob (carob-pump) coffee machines, such as Gaggia, Delonghi Dedica or Vitek, have a relatively simple design, which facilitates their maintenance. Decalcification in them takes place through a steam valve and group. Before starting the procedure, be sure to remove the filter basket from the horn (holder) so that the solution passes freely.
Fill the water tank with the prepared decalcifier solution. Turn on the machine and wait until it enters operating mode. If your model has a steam function, open the steam valve and release some liquid so that the solution enters the steam wand. Then turn off the tap and let the machine sit for 10-15 minutes to allow the acid to react with the scale.
After a pause, open the tap again and let all the solution flow through the system. Don't be afraid if the process is intermittent or hissing - this is air escaping and the scale dissolving. When the tank is empty, fill it with clean water and repeat the run procedure 2-3 times to completely remove the chemicals. This is a critical step for safety.
☑️ Checklist for decalcification of a carob machine
Don't forget to also rinse the removable steam cappuccino maker (if equipped). It is better to remove it and soak it separately in a warm solution, and then clean it with a brush. Curdled milk and scale often accumulate inside this unit, which leads to poor foaming. Regular maintenance of the cappuccino maker guarantees stable results when preparing lattes and cappuccinos.
Tip: When rinsing the carob machine, place a paper espresso filter in the cup under the group. It will catch large pieces of loose scale that may have come out of the boiler, and will not allow them to re-enter the system or clog the spout.
Features of cleaning automatic and capsule models
Automatic coffee machines (Saeco, Jura, Nivona) have a complex internal contour that cannot be disassembled without a service tool. In such models, the decalcification process is often automated. The machine itself will tell you when you need to fill the product, and will alternately open and close the valves, driving the solution through all the nodes. Your task is to monitor the fluid level in the pan and tank.
Capsule machines (Nespresso, Dolce Gusto) also require regular cleaning. Some models Nespresso There is a special cleaning mode that is activated by a combination of buttons. For Dolce Gusto There are special cleaning capsules, but you can also use a liquid solution, passing it through the system without a capsule. The main thing is not to skip the rinsing step.
In automatic machines, it is important not only to remove scale, but also to clean the brewing unit from coffee oils. For this purpose special cleaning tablets, which dissolve in water and circulate through the brewing mechanism. This prevents bitterness in the taste and jamming of the mechanism. The frequency of this procedure depends on the number of cups prepared.
| Machine type | Frequency of decalcification | Means | Features |
|---|---|---|---|
| Rozhkova | Once every 3-4 months | Liquid/Acid | Flushing via steam tap |
| Automatic | Based on sensor signal | Special liquid | Automatic cycle, long rinsing |
| Capsule | Once every 6 months | Liquid/Capsule | Simple water run |
| Geysernaya | Once a month | Citric acid | Boiling in solution (no plastic) |
For owners of automatic cars with a display, it is important to follow the on-screen instructions exactly. Interrupting the descaling process halfway may cause the machine to “remember” the error and lock out until the cycle is completed. Some models Jura or Melitta To reset the error, you may need to contact a service center, so it is better to finish what you started.