Coffee is not just a morning ritual, but a complex chemical process, the result of which directly depends on the cleanliness of the equipment. Espresso machine owners often forget that liquid for cleaning coffee machines is as important a consumable as high-quality grains. Ignoring regular care leads to the accumulation of limescale and coffee oils, which inevitably affects the taste of the drink.
The water used to prepare espresso contains mineral salts, which, when heated, settle on the boiler walls and pipes. Over time, this layer becomes thick and hard, disrupting heat transfer and permeability of the system. Decalcification is the process of removing these deposits, and without special means it is impossible. Using the wrong chemicals or plain water can lead to costly repairs.
In this article we will take a closer look at what types of cleaning products exist, how they work and why the savings on them are false. You will learn the differences between descaling products and oil cleaners. Understanding these processes will help extend the life of your machine and preserve the ideal coffee taste.
Why scale and coffee oils are dangerous for equipment
The main enemy of any heating technology is calcium and magnesium contained in water. When heated, these elements form calcium carbonate, which we know as scale. This coating has low thermal conductivity, causing the heating element to require more time and energy to heat the water. As a result heating element (tubular electric heater) overheats and burns out, and the pressure in the system drops.
The second enemy is coffee oils, or lipids. When hot water is poured through ground coffee, some of the oils remain in the brewing unit and hydraulic system. Over time, they oxidize, go rancid and acquire an unpleasant bitter taste. Rancid (rancid oil) spoils the taste of even the freshest and most expensive coffee, giving it the taste of old fat.
⚠️ Attention: Never try to remove scale mechanically or with aggressive acids not intended for the food industry. This can damage the seals and allow toxic substances to leak into the drink.
Regular use liquids for washing coffee machines solves both problems. Acidic compounds dissolve mineral deposits, turning hard stone into a soft suspension that is easily washed away. Alkaline formulations emulsify fats, allowing them to be washed off with hot water without leaving any residue.
Types of cleaning agents: acids versus alkalis
Many users mistakenly believe that any product for coffee machines is universal. In fact, the chemical industry clearly divides drugs according to their intended purpose. Decalcifiers (anti-scale agents) have an acidic environment. They are intended exclusively for dissolving mineral salts inside the boiler and pipes.
On the other hand, there are brewing system cleaners. They are alkaline based and designed to break down coffee oils and protein compounds. If you use an acid where an alkali is needed, you'll just wash away some of the scale, but you'll leave behind rancid oils that will continue to ruin the flavor.
- 🧪 Acid products - remove limescale, protect the boiler from overheating, restore steam pressure.
- 🧼 Alkaline tablets and liquids - dissolve coffee fats, clean the brewing unit, eliminate foreign tastes.
- 💧 Combination formulations are rare universal products that can perform both functions, but are often less effective in the long term.
When choosing decalcifier It is important to pay attention to the type of acid. Citric acid is too weak for serious scale, and hydrochloric acid is too aggressive for aluminum and rubber seals. The optimal choice is considered to be products based on sulfamic or lactic acid, which are effective and safe for the food tract of the device.
How to choose high-quality liquid for your device
The market is overflowing with offers, from cheap analogues to expensive brand bottles. Choice liquids for washing coffee machines should be based on compatibility with the materials of your device. Cheap products often contain high concentrations of phosphoric acid, which can corrode plastic parts and rubber gaskets.
Branded manufacturers such as DeLonghi, Saeco, Jura or Philips, it is often recommended to use their original chemistry. This is due to the fact that their devices are tested with these very compounds. However, there are also quality third-party manufacturers whose products are certified and safe.
The secret of original products
Original products are often the same chemicals as third-party analogues, but bottled with the brand logo. Whether to overpay or not is up to you, but the composition must be neutral to food materials.
Look for biodegradability labels. This is not only an environmental issue, but also an indicator of the quality of cleaning. A good product after flushing does not leave a toxic trace and is completely washed out of the system. Another important parameter is the absence of odor after completion of the washing cycle.
Decalcification technology: step-by-step instructions
The descaling process requires careful attention and adherence to the sequence of actions. First of all, you need to prepare the solution by mixing the concentrate with water in the proportion specified by the manufacturer. Usually this ratio is 1:10 or 1:20, but for heavily soiled devices concentration can be increased.
Pour the prepared solution into the water tank. Start the decalcification mode, if provided for by the design, or pass the liquid through the group and the cappuccino maker alternately. It is important not to apply steam immediately; give the chemicals time to work inside the boiler.
☑️ Checklist before starting decalcification
After half the solution has passed through the system, pause for 15-20 minutes. This will allow the acid to react with the deposits. Then complete the run. A critical step is the final rinse with clean water - you need to run 2-3 full tanks of water through the system to completely remove any remaining acid.
⚠️ Attention: Do not leave the acid solution in the boiler overnight or for a long time unless necessary. Prolonged contact of an aggressive environment with metal can lead to corrosion and microcracks.
Cleaning the brewing unit and hydraulic system from oils
If decalcification can be carried out once every 2-3 months, then it is recommended to cleanse from oils more often, especially if you drink a lot of coffee. For automatic machines there are special cleaning tablets, which are dissolved in water and passed through the brewing system. For semi-automatic machines, powders or liquids are used to soak the holders.
The process is as follows: the tablet is placed in a reservoir of water or in a special compartment, after which the washing cycle is started. The lye solution passes through the brewing unit, softening and removing old oils. Visually, you will see a dark brown, almost black liquid coming out of the spout of the cappuccino maker or group.
| Parameter | Decalcifier (Acid) | Oil Cleaner (Lye) |
|---|---|---|
| Purpose of application | Removal of mineral salts | Removing coffee fats |
| Frequency | Once every 2-4 months | Once every 2-4 weeks |
| Effect on taste | Indirect (through temperature) | Direct (removes bitterness) |
| Main component | Sulfamic/lactic acid | Sodium percarbonate/alkali |
For mechanical cleaning of the brewing unit (if it is removable), you can use special foam cleaners. They are applied to the parts, foam, drawing dirt out of the pores of the plastic, and then washed off with warm water. This allows you to clean hard-to-reach places where liquid flow does not reach.
Common mistakes when servicing coffee machines
The most common mistake is using vinegar or citric acid from the grocery store. Acetic acid has a pungent odor that is very difficult to wash out and can damage rubber seals. Citric acid in powder often does not completely dissolve, forming crystals that can clog the thin tubes of the device.
The second mistake is ignoring rinsing with clean water after chemistry. Residue from the cleaning product will end up in the cup, making the coffee undrinkable and potentially hazardous to your health. Always allow sufficient time for the rinsing phase.
Tip: If you use bottled or filtered water with low hardness, the intervals between decalcification can be increased, but you cannot completely abandon them, since salts are present in any water.
The third mistake is mixing different types of chemistry. Never add descaling agent to oil cleaner. The reaction between acid and alkali can result in a violent release of heat and gas, which is dangerous for the plastic parts and the user.
FAQ: Frequently asked questions
Is it dishwasher safe?
Absolutely not. Dishwasher detergents contain chlorine and fragrances that are not intended for contact with food tracts under pressure and at high temperatures. This will ruin the taste of the coffee and may be toxic.
How often should I thoroughly clean my coffee machine?
Decalcification is carried out as the tank is used up (usually 200-300 liters) or once every 3 months. Cleaning from oils - once a month or after every kilogram of grains used, depending on the intensity of use.
Why did my coffee turn sour after cleaning?
Most likely, you did not flush the system well with clean water, and an acidic solution remains in it. Repeat the rinse cycle with clean water 2-3 more times until the foreign taste disappears.
Are chemicals harmful to health?
Specialized liquid for cleaning coffee machines certified for food use. When used correctly and washed thoroughly, it is completely safe. Only technical acids and alkalis pose a danger.
Regular use of the right chemicals extends the life of the coffee machine by 2-3 times and guarantees a stable coffee taste without bitterness or foreign flavors.