How to clean the air humidifier Xiaomi from the plaque inside: 5 proven methods

Xiaomi's humidifier is an indispensable tool in the fight against dry air, especially during the heating season. But over time, the tank and the membrane produce white limestone plaque, and in neglected cases, black mold spots, which not only damage the appearance, but also reduce the efficiency of the device, and can also cause unpleasant odors or even allergens. Why does this happen?

The reason is hard water: calcium and magnesium salts settle on the walls when moisture evaporates. In ultrasonic humidifiers (like most Xiaomi Smartmi or Mi Air Humidifier models), the plaque is formed faster due to a vibration membrane that sprays water along with mineral particles. If you ignore cleaning, the device will spray steam worse, and its parts wear out 2-3 times faster.

In this article, you will find step-by-step instructions for cleaning the Xiaomi moisturizer from plaque and mold, a list of safe products (including home counterparts), as well as tips for prevention. We will pay special attention to the nuances for popular models: Smartmi Air Humidifier 2/3, Mi Air Humidifier Pro and Xiaomi Deerma Humidifier.

1. Preparing the moisturiser for cleaning: what to do before starting

Before you start removing the plaque, the device must be properly prepared, and failure to do so can cause damage to electronic components or inefficient cleaning.

First, disconnect the humidifier from the mains — even if it is switched off, some models (such as Smartmi Air Humidifier 3) still have a voltage on the control board. Then drain the remaining water from the tank and dismantle the removable elements: the top cover, the filter (if any), and the ultrasonic membrane (in models with a collapsible design).

Deep cleaning will require:

• 🧽 Soft sponge or microfiber cloth (does not scratch plastic)
• 🧪 Vinegar 9% or citric acid (for dissolving plaque)
• 🧴 A means for washing dishes (without abrasives)
• 🧤 Rubber gloves (protection of the skin from chemicals)
• 🔦 Lantern (to view hard-to-reach places)

⚠️ Warning: Never use metal brushes, hard washcloths or acetone to clean, which damage the antibacterial coating of the tank (if any) and can leave microcracks in which bacteria multiply.

2. How to remove lime plaque: 3 safe methods

Lime plaque is a major problem for Xiaomi humidifier owners, and it's produced even when filtered water is used, because most household filters can't remove all the hard salts. Let's look at three proven ways to remove it.

Method 1: Vinegar solution (for strong plaque)

Acetic acid effectively dissolves carbonate deposits.

1. Mix 9% vinegar with water in a 1:1 ratio.
2. Pour the solution into the tank to the maximum mark and leave for 1-2 hours (with a thick layer of plaque - overnight).
3. After the specified time, gently shake the tank so that the detached particles separate from the walls.
4. Pour the solution and rinse the tank with running water 3-4 times.

For a membrane, immerse it in acetic solution for 20 to 30 minutes, then rinse it under a stream of water. Don't rub the membrane with a sponge, it's fragile!

Method 2: Citric acid (sparing option)

If you don't like the acetic smell, replace it with citric acid. Dilute 2 tbsp. powder in 1 liter of warm water, pour in the tank and leave for 1 hour. To enhance the effect, you can turn on the humidifier for 5-10 minutes in maximum spray mode - this will help the solution to penetrate into hard-to-reach places.

Method 3: Special Remedies (for the lazy)

In household chemicals stores, ready-made formulations for humidifiers are sold, for example:

• 🧴 Top House – Removes plaque and disinfects
• 🧴 Bork – suitable for ultrasonic models
• 🧴 Karcher - concentrate, diluted with water

Use them according to the instructions on the package, the main advantage is that you do not have to wait: the exposure time usually does not exceed 15-20 minutes.

3. Fighting mold and bacteria: disinfecting the humidifier

Black spots of mold or green plaque inside the tank signal the growth of microorganisms. This is dangerous: when sprayed with water, mold spores enter the air and can cause allergies or breathing problems.

• 🧪 Hydrogen peroxide 3% - pour in the tank for 1 hour, then rinse. Peroxide kills 99% of bacteria and mold.
• 🧴 Chlorhexidine (pharmacy solution 0.05%) - processing takes 30 minutes, after which you need to wash the tank 5-6 times.
• 🍋 Soda. + lemon juice - mix to a state of gruel, apply to mold spots with a sponge, after 15 minutes wash off.

⚠️ Warning: Do not use bleach (like White) to clean Xiaomi humidifiers.Chlorine corrodes plastic and can damage electronic components, especially in touch-controlled models (Smartmi Air Humidifier 2).

After disinfection, be sure to dry all the parts in the air for 2-3 hours. The humid environment promotes the reappearance of mold. To speed up the process, you can use a fan.

4. Cleaning hard-to-reach areas: membrane, filters, fan

Plaque and mold often accumulate in places that you can't see on a surface inspection. Let's look at how to clean key elements of Xiaomi's moisturizer:

Xiaomi Smartmi Air Humidifier 3 and Mi Air Humidifier Pro have a built-in ionizer, cleaned with a dry cloth without chemical means – just remove dust from the metal plates.

If the humidifier has stopped spraying steam or is making an uncharacteristic noise after cleaning the membrane, check its integrity. The damaged membrane needs to be replaced, it can't be repaired.

5.Plaque prevention: how to use a humidifier to clean it less often

Regular cleaning of Xiaomi humidifier takes time, but it can be minimized by following simple rules:

• 💧 Use distilled or soft water (such as bottled water), boiled water at the very least, but even it leaves a plaque.
• 🔄 Change water daily, even if the humidifier is not working. Stagnant water is the perfect environment for bacteria.
• ☀️ Dry the tank after each use. Leave the lid open so that moisture evaporates.
• 🧼 Wash the tank with warm water every 3-4 days, even if it is visually clean.

For models with water softening cartridges (such as Smartmi Air Humidifier 2), it is important to replace them in time, and the cartridge will last 2-3 months, after which it will no longer retain salts.

💡

If your area is very hard water, add 1-2 dishwasher tablets (like Finish) to the tank, which will soften the water and reduce plaque formation. But don't use this method more than 1 time a week!

6. Frequent mistakes when cleaning Xiaomi humidifiers

Many users make mistakes that cause the device to break down or deteriorate, and here are the most common ones:

• 🚫 Using abrasives (dry soda, pemolux powders) that scratch the plastic, and then the plaque is delayed even faster.
• 🚫 Rinse the membrane under running water under high pressure, and it destroys its structure.
• 🚫 Drying the humidifier in disassembled form under direct sunlight, plastic can deform, and electronic components can overheat.
• 🚫 Ignoring strange sounds after cleaning. crunch or whistling often means the membrane is damaged or incorrectly installed.

Another mistake is cleaning the humidifier when it's on, and even if the device is switched off, some models (such as the Xiaomi Mi Air Humidifier Pro) still have a voltage on the control board, which can short circuit when moisture hits.

1. Correct installation of the membrane.

Clean air vents.

3. filter integrity (if any).

Often the problem is solved by reassembling the device.-->

7. Features of cleaning for popular Xiaomi models

Xiaomi’s humidifier design differs depending on the model, and let’s look at the nuances for the most common ones:

Smartmi Air Humidifier 2/3

In these models, the membrane is removable, but it's attached to the latches.

1. Turn the tank over and press the locks on the sides of the membrane.
2. Pull it up carefully - don't make any effort!
3. For cleaning, use only liquids (vinegar, citric acid).

Smartmi Air Humidifier 3 has a built-in hygrostat, and after cleaning it, you need to calibrate it: turn on the device and hold the Mist button for 5 seconds until the indicator flashes.

Mi Air Humidifier Pro

This model is equipped with a dual filtration system (cartridge + carbon filter), both elements must be washed separately:

• Cartridge for water softening - rinse under running water 1 time a week.
• Coal filter - replace every 3 months (not cleaned).

Xiaomi Deerma Humidifier

It's a budget model with a simplified design, and it's a non-removable membrane, so you can only clean it by pouring the solution into the tank, and the important thing is, don't turn on the device without water, it will overheat the membrane.

FAQ: Answers to Frequent Questions