Xiaomi’s modern air purifiers have become an integral part of the smart home system for millions of users, providing a comfortable living environment. However, even the most advanced device requires regular maintenance to maintain its declared filtering efficiency. Many owners mistakenly believe that it is enough to change consumables in time, ignoring the need for regular cleaning of internal components.
In fact, the accumulation of dust on the external elements and in the sensors can significantly distort the readings of air quality, making the device work idle or, conversely, ignore the real pollution. Proper care of the case, fan and sensors ensures not only the purity of the blown air, but also prolongs the life of the motor. In this article, we will discuss in detail all the stages of maintenance of your equipment.
Before you start taking action, it is critical to protect yourself and your device from electrical damage. Always disconnect the power cleaner before any cleaning work begins, even if you are simply dusting the case. This is a basic safety rule, neglect of which can lead to a short circuit or failure of the electronics.
Preparation for maintenance and safety
The maintenance process begins long before you pick up the rag. The first step is to choose the right place and time. It's best to clean in a well-ventilated room or on the balcony so that the raised dust doesn't settle back on the parts you just washed, you'll need to prepare a soft microfiber fabric, dry cotton swabs and maybe a vacuum cleaner with a narrow nozzle.
It is strongly discouraged to use aggressive household chemicals, abrasive sponges or hot water. The plastic used in Xiaomi cases can become cloudy or warped by chemicals, and the electronic components inside the sensors are sensitive to moisture.
⚠️ Warning: Never try to wash HEPA-The filter is water if it does not clearly indicate that it is washable. 99% of the time, standard filters for Xiaomi cleaners lose their properties when wet and become unusable.
Make sure you have enough space to disassemble the device.Remove the back cover, remove the filter unit and put it aside.If you plan to clean the internal channels where the fan is located, partial disassembly of the case may be required, however, regular care is usually sufficient to access removable elements.
Cleaning of the outer enclosure and air intake grilles
The outside of the device is exposed to constant environmental influences. On the white surface of the Xiaomi case, dust can be clearly seen, which can eventually eat into the structure of the plastic. To clean, use dry or slightly moist microfiber fabric. Movements should be smooth, without heavy pressure, so as not to scratch the glossy elements.
Special attention should be paid to the air intake grid located at the back or around the perimeter of the device, through which the bulk of the air enters, and large fractions of dust, animal hair and villi often accumulate here. Use a vacuum cleaner with a soft brush to remove visible contaminants from the cells of the grid.
- 🧼 Wipe the body only with a well-pressed cloth, avoiding water entering the joints and holes.
- 🌬️ Use a soft brush to remove dust from hard-to-reach lattice recesses.
- 🚫 Avoid using alcohol or solvents that can damage the matte coating of plastic.
If you have persistent contaminants on your body, you can use a drop of soft detergent added to the water. After wet cleaning, be sure to wipe the surface with a dry cloth to prevent the formation of divorces. A clean case is not only aesthetic, but also a guarantee that dust from the surface will not be sucked back into the device.
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Use an antistatic wipe for the final cleaning of the case – this will help to repel dust longer and reduce the frequency of necessary cleanings.
Maintenance of the prefilter and main filter
The heart of any cleaner is the filter unit. In Xiaomi devices, it usually consists of two or three layers: an external prefilter (grid), the main prefilter. HEPA-The prefilter is a small plastic or metal mesh that is designed to trap large dust, hair and down.
To maintain the prefilter, carefully remove it from the main unit. If there is a lot of wool on the net, first remove it manually or with a soft brush. Then the net can be washed under a stream of warm water. Use a soft brush to remove the entrenched dust between the cells. After washing, thoroughly shake off the water and leave the filter to dry horizontally for at least 24 hours.
⚠️ Attention: Installation of a wet prefilter back into the device is unacceptable. HEPA-filter or fan can cause contact corrosion, mold inside the device, or short circuit.
Basic HEPA-Cleaning the filter and the carbon layer with water is strictly forbidden. HEPA-The material when wet stick together, and the filter stops passing air with the desired efficiency, and the coal can begin to crumble. The only method available for their care is to clean the exterior cleaner (from the clean area) or tap lightly to remove surface dust, although manufacturers often recommend simply changing them after their service life.
Visual inspection of filters should be a regular procedure. HEPA-The filter has become gray or black, and the carbon layer has lost its smell of freshness or has started to smell sour — it's time to replace it. Trying to resuscitate a disposable filter can lead to the growth of bacteria inside the device, which will turn the cleaner into a source of contamination.
Cleaning of air quality sensor and fan
One of the most common reasons Xiaomi cleaners fail is contamination of the particulate matter laser sensor (PM2.5), which is located on the back or side of the device and is closed with a small protective cover. If the sensor is dusty, the device can show excellent air quality in a smokey room or, conversely, hum at maximum in a clean room.
To clean the sensor, find a hole, usually marked with a symbol or the words "Air Inlet." Carefully open the protective cover (in some models it is removed, in others it reclines). Inside you will see a small window of the sensor. Take a dry cotton swab and very delicately, without pressing, wipe the glass surface of the sensor. You can also use a pear to blow out dust, but do not blow with your mouth to avoid moisture.
The fan is a mechanism that also requires attention, especially if the device has been in use for a long time. The fan blades can become a sticky layer of dust, which creates imbalance and increases noise when working. Accessing the fan often requires removing the back cover completely. Rub the blades with a wet cloth, carefully removing the plaque, and checking the rotation axis for foreign objects.
- 👁️ Clean the air quality sensor every time 2-3 month-long accuracy.
- 🌀 Remove dust from fan blades during each deep cleaning of the device.
- 🔍 Check the integrity of the blades for cracks before installing back.
After cleaning the internal components, allow the device to stand for 10-15 minutes to evaporate possible micro-humidity before connecting it to the network, and assemble in reverse order, making sure that all latches fell into place with a characteristic click.
☑️ Checklist of deep cleaning
Indication and reset of the filter counter in the application
Modern Xiaomi cleaners are equipped with a smart filter resource monitoring system. After replacing or cleaning components, you need to reset the meter so that the device correctly displays the remaining life, this is done through the Mi Home mobile application or Xiaomi Home.
Go to the app, select your air purifier from the list of devices. In the control menu, find the item associated with the filters (usually displayed percentage of resource); click on the icon or menu item to reset the timer. In some models, you can reset through a button on the device itself, holding it for a few seconds, but the software method is more reliable.
| Cleaner model | Prefilter life | HEPA service life | Coal life |
|---|---|---|---|
| Xiaomi Air Purifier 3/3H | 1-2 months (cleaning) | 6-12 months | 6-12 months |
| Xiaomi Air Purifier 4/4 Pro | 1-2 months (cleaning) | 6-12 months | 6-12 months |
| Xiaomi Air Purifier Pro H | 1-2 months (cleaning) | 6-12 months | 6-12 months |
It's important to understand that the manufacturer's stated lifespan of filters (usually 6 to 12 months) is averaged: in a metropolis with high levels of air pollution or with pets, filters can become polluted twice as fast.
What to do if the filter indicator flashes after replacement?
Frequent mistakes in cleaning up
Despite the simplicity of the design, users often make mistakes that negate the efficiency of the device, one of the most common is to try to wash disposable filters with water. HEPA-Another mistake is ignoring the sensor cleaning, which causes the automation to work incorrectly.
Some users install a cleaner in the corner or behind the curtain, limiting air flow. To work properly, the device needs free air from all sides, especially from the back and top. It is also a mistake to use aromatic oils directly on the filter, which clogs the pores and can damage the plastic case.
⚠️ Warning: Do not use a cleaner in humid areas (such as a bathroom) without special training unless the model is designed for this.Moisture combined with dust creates an ideal environment for bacteria to multiply inside the filter, which will then be spread throughout the room.
Regular maintenance is the key to a long and efficient operation of your equipment. Simple actions, taking 15-20 minutes once a month, will allow the Xiaomi device to work like new, providing you with clean and healthy air.
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Regular cleaning of the prefilter and air quality sensor is more important than frequent replacement of expensive ones. HEPA-filters, as they ensure the correct operation of automation and reduce the load on the main filter.