Regular coffee drinking has become an integral part of the morning ritual for millions of people, but few people think about what happens inside their coffee machine. The water used to prepare the drink contains dissolved calcium and magnesium salts, which, when heated, settle on the walls of the heating elements. This hard coating, known as scale, can significantly reduce the efficiency of the device and spoil the taste of your favorite espresso.
Ignoring the problem of deposit formation can lead to serious consequences, including complete failure of expensive equipment. A thin layer of stone on the heating element causes it to work overload, consuming more electricity and gradually deteriorating. In this article we will look in detail at how to properly carry out decalcification, what products to choose and how to extend the life of your coffee maker.
The cleaning process does not require special technical skills, but requires accuracy and adherence to certain proportions. Capillary systems carob coffee machines and boilers of drip models have different designs, so the approach to their maintenance may differ. A correctly performed procedure will return the device to factory performance and improve the aromatic properties of the drink.
Why does scale form and why is it dangerous?
The main cause of hard deposits is the hardness of tap water. Depending on the region of residence, the concentration of hardness salts may vary, but they are present almost everywhere. When heated above 60 degrees Celsius, calcium and magnesium bicarbonates decompose, forming insoluble calcium carbonate, which forms that same white or yellowish coating.
The danger of scale lies not only in the aesthetic aspect, but also in the direct impact on the technical characteristics of the device. A layer of deposits just half a millimeter thick can reduce the heat transfer of the heating element by 10-15%, which forces the thermostat to turn on the heating element more often and for a longer time. This is a direct path to overheating and burning of expensive components.
⚠️ Attention: If you hear extraneous noise, buzzing or crackling when heating water, this is a sure sign that the scale layer is already critically large and requires immediate removal.
In addition, particles of exfoliated scale can get into the brewing unit, clogging thin channels and nozzles. This leads to uneven passage of water through the coffee tablet, which negatively affects the quality of the extraction. The taste of the drink becomes flat, and an unpleasant burnt or metallic taste may appear.
Signs that urgent cleaning is needed
Modern models of coffee machines are often equipped with indicators that signal the need for maintenance. However, you should not rely solely on electronics, as sensors may fail or be calibrated incorrectly. There are a number of visual and taste cues that will indicate that decalcification needed right now.
First of all, pay attention to the cooking time of the portion. If previously the process took 25 seconds, but now it takes 40-50 seconds, it means that the system’s permeability has decreased due to overgrowing of the channels. It is also worth listening to the operation of the pump: a change in the tone of the sound often indicates increased resistance in the hydraulic system.
- 📉 Reducing the pressure of the steam jet from the cappuccino maker, which makes it impossible to whip up thick milk foam.
- ☕ Change in the taste of coffee, the appearance of a sour or metallic taste that was not there before.
- 💧 Reducing the volume of liquid flowing out during a standard brewing cycle.
- 🔊 The appearance of a characteristic whistle or intermittent noise during operation of the heater.
Another important indicator is the condition of the filters. If you use reusable filter baskets, inspect them after use. The presence of a whitish coating on the mesh or walls is a direct signal that salts have begun to actively precipitate. In such cases, you cannot delay cleaning, since the process is already underway throughout the entire system.
Use filtered or bottled water of low mineralization to make coffee - this will reduce the formation of scale and improve the taste of the drink.
Selecting a descaling product
The household chemicals market offers many specialized solutions, but many users prefer traditional methods. The effectiveness of any product depends on its ability to react with carbonates, turning them into soluble salts. It is important to choose a method that will be safe for the rubber seals and plastic parts of your model.
Specialized fluids such as DeLonghi EcoDecalk or Saeco Decalcifier, are designed taking into account the materials used in the coffee industry. They contain corrosion inhibitors and additives that protect rubber gaskets from drying out and destruction. The use of such means is often a prerequisite for maintaining the warranty on the device.
Citric acid is a popular and affordable alternative. This is an organic acid that effectively dissolves calcium deposits. However, its concentration must be selected carefully, since a solution that is too aggressive can damage internal components. Acetic acid is also used, but has a pungent odor that takes a long time to wash out of the system and can overpower the aroma of coffee.
| Means | Efficiency | Safety for rubber | Smell |
|---|---|---|---|
| Special fluid | High | Safe | Neutral |
| Citric acid | Medium/High | Conditionally safe | Missing |
| Acetic acid | High | Risk of damage | Sharp |
| Tablets | High | Safe | Neutral |
When choosing between powder and liquid, it is worth considering the convenience of dosing. Liquid concentrates are easier to mix with water in the right proportions, while powdered products require careful dissolution to prevent undissolved crystals from entering the system. Tablet forms are the most convenient, as they have a strictly fixed dosage for one cleaning cycle.
Preparing the coffee maker for the procedure
Before starting any maintenance work, the device must be properly prepared. This applies to both simple drip models and complex carob machines. The first step should always be to disconnect the device from the power supply, unless the instructions suggest cleaning while it is on (which is true for some automatic cycles).
Be sure to remove any remaining coffee from the brewing unit and grounds container. Old coffee grounds combined with descaling acid can form a dense substance that is difficult to wash out. Wash removable parts with warm water without using detergents to avoid chemical reaction.
⚠️ Attention: Never use abrasive sponges or metal brushes to clean the internal surfaces of the water tank - micro-scratches will become a breeding ground for bacteria.
If your model is equipped with a water filter jug, it must be removed before starting the procedure. Filter material saturated with silver ions and other substances can react with acid, which will lead to filter damage and contamination of the solution. Also check the water level in the tank - it must meet the requirements for preparing a certain number of servings.
☑️ Preparation for decalcification
Citric acid cleaning technology
Citric acid is the most popular budget means for combating scale. To prepare the working solution, you need to dilute 20-30 grams of powder (about 2 tablespoons) in 1-1.5 liters of warm water. It is important to use warm water, since in cold water the acid takes longer to dissolve and is less effective.
Pour the resulting solution into the water reservoir of the coffee maker. Turn on the device and start the coffee brewing process without adding ground beans. If you have a drip coffee maker, simply turn on the brew setting. For carob models, it may be necessary to turn on the water supply through the holder several times, alternating with pauses for cooling, so as not to overheat the pump.
After all the solution has passed through the system, leave the coffee maker alone for 15-20 minutes. This time is necessary for the acid to react with the deposits and soften them. Then repeat the procedure for removing the remaining solution. Do not forget that the aggressive environment should not be in contact with the metal for a long time, so it is not recommended to leave the solution inside for hours.
Can I use hot water for the solution?
Using boiling water to dissolve citric acid is not recommended, as this may reduce its effectiveness and create a risk of burns when transfused. The optimal water temperature is 40-50 degrees Celsius.
The final and most important step is flushing the system with clean water. It is necessary to run a full tank of clean water through the coffee maker 2-3 times to completely wash away any remaining acid and dissolved salts. If you ignore this step, your next coffee will have an unpleasant sour taste.
Cleaning automatic coffee machines using special products
Owners of automatic coffee machines such as Jura, Philips Saeco or DeLonghi Magnifica, often have a built-in decalcification program. The use of original or compatible liquid products is preferable in such cases, as they have the correct acidity and do not foam, which is important for internal pumps.
The process is usually started through the maintenance menu. The machine itself will tell you when to top up the solution and when to add clean water for rinsing. It is important to strictly follow the instructions on the display and not interrupt the process. Automation regulates temperature and pressure for the most efficient passage of the reagent through the boiler and brewing unit.
- 🧴 Pour the product into the water tank according to the instructions on the bottle (usually 100 ml per 1 liter).
- 🔄 Launch the "Decalcification" or "Descaling" program through the menu.
- ⏳ Wait for the end of the cycle, which can take from 20 to 40 minutes.
- 💧 Flush the system several times with clean water until the machine beeps when finished.
Some models require the cycle counter to be reset after cleaning. If the scale indicator continues to light even after the procedure, find in the instructions a combination of buttons to reset the counter. Often this involves holding down certain keys at the same time for a long time.
Automatic cleaning programs are the most effective because they ensure that the cleaning agent passes through all parts of the machine, including hidden channels that cannot be reached manually.
Prevention and care of the device
To prevent the question “how to descale a coffee maker” from coming up too often, it is important to pay attention to prevention. The frequency of maintenance depends on the water hardness in your area and the intensity of use of the device. On average, decalcification is recommended once every 2-3 months with daily use.
Using softened water is the best way to extend the life of your heating elements. If installing a stationary water filter is not possible, use filter jugs or buy bottled water labeled “for coffee machines.” This will not only reduce the amount of scale, but also improve the taste of the coffee, as the excess minerals will mask the subtle notes of the bean.
After each use, it is advisable to wipe the steam cappuccino maker with a damp cloth. Milk residues, mixed with steam and high temperatures, create an ideal environment for bacteria and can clog the openings of the cappuccino maker, which indirectly affects the operation of the entire steam system.
⚠️ Attention: Do not store water in the coffee maker tank for longer than 2-3 days. Stagnant water “blooms,” which leads to the formation of a biofilm inside the tank and pipes, which is difficult to remove by conventional decalcification.
Regularly check the condition of the capsule piercing needle (if you have a capsule machine) and the holder mesh. Mechanical cleaning of these elements from coffee oils and small stone particles should be carried out weekly. A comprehensive approach to care ensures that your coffee maker will provide you with excellent coffee for many years to come.
Frequently asked questions (FAQ)
Can I clean my coffee maker with vinegar?
You can use vinegar, but with great caution. Acetic acid has a pungent odor that is very difficult to remove from rubber seals and plastic pipes. The taste of vinegar can linger in drinks even after repeated rinsing. In addition, vinegar is more aggressive to some types of rubber than citric acid or specialized products, which can lead to premature wear.
How often should decalcification be carried out?
The frequency depends on the water hardness and frequency of use. On average, manufacturers recommend carrying out the procedure every 2-3 months or after preparing 200-300 cups. If you use soft filtered water, the interval can be increased to 4-6 months. If the water is very hard, reduce to 1 month.
Is citric acid harmful to your coffee maker?
When used in correct proportions (no more than 30 g per 1 liter of water), citric acid is safe for most materials used in coffee makers. However, frequent use of concentrated solutions can adversely affect aluminum parts (if any) and rubber seals. Always rinse the system thoroughly with clean water after cleaning.
What should I do if my coffee turns sour after cleaning?
A sour taste indicates that there are cleaning agent residues in the system. It is necessary to continue rinsing with clean water. Run the brew cycle without coffee 2-3 more times until the water coming out tastes neutral. If the problem persists, the product may have been too concentrated and damaged the internal components.