Xiaomi's air humidifier is an indispensable tool in the fight against dry air, especially during the heating season. But even the most modern device requires regular maintenance. The main problem owners face is the formation of scale, mold and bacterial plaque in the water tank. If you ignore the cleaning, the humidifier will not only lose its effectiveness, but also become a source of unpleasant odor or even a spreader of harmful microorganisms.
In this article, we will discuss how to properly clean the Xiaomi humidifier tank (including popular Smartmi Air Humidifier 2/3, Mi Air Humidifier Pro and others), what tools to use and what can damage the device. You will also learn how often to perform the procedure and how to avoid typical errors that reduce the life of the equipment. If you notice that the humidifier has become worse, the water in the tank has become cloudy or white coating, it is time to act!
Why is cleaning the Xiaomi humidifier tank a must?
Many users mistakenly believe that it is enough to just pour distilled water into a humidifier and the problem is solved. In fact, even when using purified water in a tank, over time, you form:
- 🧂 Mineral deposits (scale) - the remains of calcium and magnesium salts that settle on the walls and bottom of the tank, as well as on the ultrasonic membrane (in models with ultrasonic principle of operation).
- 🍄 Mold and fungus - develop in conditions of constant humidity, especially if the water remains in the tank for a long time.
- 🦠 Bacterial film – can appear after 2-3 days of use, if you do not drain the water after each cycle.
- 💨 Unpleasant smell - the result of the decomposition of organic substances, often accompanied by turbidity of water.
Consequences of ignoring cleaning:
- ⚠️ Decreased performance - scale blocks the ultrasonic membrane, and the humidifier begins to give out less steam.
- ⚠️ Breakdown of the device - in advanced cases, the raid can disable the heating element (in steam models) or electronic components.
- ⚠️ Health risk – mold and bacteria spread with steam can cause allergies, coughing, or asthma exacerbations.
⚠️ Attention, if you notice black dots or green plaque on the walls of the tank, it's a sign of mold growing, and you can't use a humidifier until you have a deep disinfection.
What can be cleaned the tank: safe and prohibited means
Not all detergents are suitable for the care of Xiaomi moisturizer. Aggressive chemicals can damage plastic, rubber seals or ultrasonic membranes. Below is a table with allowed and prohibited options.
| Remedy. | Can I use it? | Commentary |
|---|---|---|
| Citric acid (5-10 g per 1 liter of water) | ✅ Yes. | Effectively removes scale, safe for plastic, recommended for regular cleaning. |
| Acetic acid (9%, diluted 1:1) | ✅ Yes. | It's good with mold and lime, but it has a pungent smell. It requires careful rinsing. |
| Soda (baking) | ✅ Yes. | Soft abrasive for mechanical cleaning, can be used in a paste of water for hard-to-reach places. |
| Special humidifier tablets (e.g. Philips AC4082) | ✅ Yes. | The best option is to remove scale, disinfect and not damage the device, suitable for all Xiaomi models. |
| White, chlorine, bleach. | ❌ No. | They corrode plastic, leave toxic fumes, and they can break the ultrasonic membrane. |
| Abrasive powders (type Pemolyux) | ❌ No. | Scratching the surface of the reservoir, which accelerates the formation of a new raid. |
| Washing products (such as Fairy) | ⚠️ Limitedly. | You can only use it for external cleaning of the case, and you can't put it in the tank, because the foam can damage the machinery. |
Important: in the humidifier Xiaomi Smartmi Air Humidifier 2 and Mi Air Humidifier Pro ultrasonic membrane is particularly sensitive to chemical influences.
If you prefer off-the-shelf solutions, look for humidifier disinfectants that not only clean but also prevent mold from forming for 1-2 weeks. Popular brands: Philips, Boneco, Venta.
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After cleaning with vinegar or citric acid, rinse the tank 2-3 times and let it dry in the air for 30 minutes - this will eliminate the residual odor.
Step-by-step: how to clean the Xiaomi humidifier tank
The cleaning process depends on the degree of contamination. If you do regular prophylaxis (every 1-2 weeks), easy cleaning is enough. To remove the old plaque or mold will require deep disinfection.
Preparation of the device
- 🔌 Disconnect the humidifier from the network and drain the remaining water.
- 🧽 Disassemble the device: remove the tank, remove the filter (if any) and other removable parts (for example, the spray nozzle in Smartmi Air Humidifier 3 models).
- 📸 Take a picture of the location of the parts, then assemble the humidifier correctly.
2. Scale cleansing (for mild contaminants)
Pour warm water into the tank (30–40)°C) with citric acid (1 tbsp per 1 litre)|Leave for 1-2 hours, periodically shaking|Wipe the walls with a soft sponge or brush|Wash under running water 2-3 times-->
For ultrasonic models (Smartmi Air Humidifier 2, Mi Air Humidifier) after soaking, gently clean the ultrasonic membrane with a cotton swab dipped in the same solution. Do not use metal objects!
3.Mold removal and disinfection
If there are black dots or green plaque in the tank:
- Prepare the solution: 1 part vinegar (9%) to 1 part water.
- Pour in the tank and leave for 30-60 minutes.
- Wash all surfaces with a brush, paying attention to the corners and joints.
- Wash the tank with boiled water (not running!) 3-4 times.
⚠️ If mold is deeply embedded in the plastic and is not removed mechanically, replace the reservoir.
4. Cleaning of the filter and other parts
Xiaomi models often have antibacterial or carbon filters installed (such as the Smartmi Air Humidifier Pro), which cannot be washed underwater, only vacuumed or cleaned carefully with a dry brush, and the filter lasts 2-3 months, after which it needs to be replaced.
To clean the spray nozzle (if it is removable), use a toothpick or cotton swab dipped in a vinegar solution.
5. Assembly and inspection
After cleaning:
- 🔍 Make sure all the details are dry.
- 🧩 Collect the humidifier in reverse order.
- 💧 Pour clean water and turn the device on for 10-15 minutes in maximum performance mode to wash away the residues of detergents.
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Never turn on the humidifier immediately after cleaning with vinegar or citric acid - residues can damage the machinery when heated. Always flush and dry the tank!
How often should you clean the Xiaomi humidifier?
The frequency of treatment depends on the hardness of the water, the intensity of use and the model of the device.
| Type of cleaning | Frequency | Signs it's time to clean up |
|---|---|---|
| Daily care | After each use | Pour the water, wipe the tank with a dry cloth. |
| Easy cleaning (from scale) | 1 time 3-7 days | The appearance of white plaque on the walls, muddy water. |
| Deep cleaning (disinfection) | 1 time 2-4 weeks | Bad smell, green/black coating, reduced productivity. |
| Replacement of the filter | Every 2-3 months | The filter turned dark, there was a persistent smell. |
For regions with hard water (for example, Moscow, St. Petersburg), it is recommended to clean scale every 2-3 days, in which case it is advisable to use distilled or bottled water - this will reduce the frequency of care by 2-3 times.
In models with hygrostat (automatic maintenance of humidity, as in Smartmi Air Humidifier 3), water can stagnate longer, so cleaning should be carried out more often - every 3-4 days.
What happens if you don’t clean the humidifier for months?
Typical mistakes when cleaning Xiaomi moisturiser
Even experienced users sometimes make mistakes that shorten the life of the device, and here are the most common:
- 🚫 Using boiling water can deform the plastic of the tank, especially in models with thin walls (Mi Air Humidifier Compact).°C.
- 🚫 Cleaning with metal brushes or sponges - scratches the surface, which accelerates the formation of a new plaque.
- 🚫 Neglect of drying - if you collect the humidifier moist, mold will quickly appear inside.
- 🚫 Using aromatic oils – clogs filters and can disable the ultrasonic membrane (in Smartmi models this voids the warranty!).
- 🚫 Cleaning only the reservoir - the plaque also accumulates at the bottom of the base, where the membrane or heating element is located.
Another mistake is to use a humidifier without water, which in ultrasonic models causes the membrane to overheat, and in steam models, causes the heater to fail. Always check the water level before turning on!
⚠️ Attention! Xiaomi humidifiers with Baby Mode function (for example, Smartmi Air Humidifier 2) can not use aggressive detergents - their residues can cause respiratory irritation in children.
Care Tips: How to Clean the Moisturizer Less Often
To reduce the frequency of cleaning will help proper operation:
- 💧 Use soft water — distilled, bottled, or passed through a reverse osmosis filter — to reduce scale by 5 to 10 times.
- 🔄 Change water daily – even if the humidifier is not working, stagnant water becomes a breeding ground for bacteria.
- ☀️ Dry the tank after use – leave the tank open for 1-2 hours to evaporate moisture.
- 🌿 Add antibacterial supplements – special cassettes or tablets (for example, Xiaomi Mi Air Purifier Antibacterial Filter) will prolong the purity of water.
- 📅 Keep a cleaning log – mark dates on your calendar or reminder on your phone so you don’t miss the scheduled procedure.
For models with ionization (such as Smartmi Air Humidifier Pro), it is recommended to turn off this feature if there are allergies or asthmatics in the room.
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If you use a humidifier around the clock, install a hygrometer nearby (for example, Xiaomi Bluetooth Temperature and Humidity Sensor), which will help to avoid excessive humidity, in which mold grows faster.