Xiaomi soaps are some of the most popular automatic dosage devices for liquid soap, antiseptic or detergent in smart homes. They combine a compact design, technology and ease of use, but many users face difficulties in first filling up. Unlike conventional dispensers, it is important to consider the type of liquid, the volume of the tank and the operation of the pump system.
In this article, we will look at all the steps of refueling, from choosing the right detergent to the intricacies of service for different models (Xiaomi Mijia Automatic Soap Dispenser, Viomi V3, etc.), learn how to avoid common mistakes, such as clogging of the nozzle or incorrect sensor operation, and get practical tips for extending the life of the device. If your soapbox stopped giving out liquid or is working with interruptions, here you will find solutions.
What liquid can be filled in the soapbox Xiaomi
Not all detergents are suitable for Xiaomi automatic dispensers. Using the wrong liquid can cause the pump to break, foam inside the tank or lock the sensor.
- 🧼 Consistency: the liquid must be low viscosity (like water.
- 🔬 Composition: Avoid products with abrasive particles (scrabs) or aggressive solvents (acetone, alcohol) >70%).
- 🌡️ Temperature: optimal use of room temperature liquids (15–25)°C) Cold or hot can cause condensation inside.
- 🚫 Prohibited substances: bleach, concentrated acids / alkalis, essential oils (can eat plastic).
The manufacturer recommends original Xiaomi consumables or certified analogues (for example, Viomi Foaming Hand Soap). However, ordinary liquid soaps without additives will do, if they meet the specified parameters. For the test, drop the product on glass - if it spreads quickly and does not leave a dense trace, it can be used.
⚠️ Warning: If you fill the soapbox with an alcohol-based antiseptic, its concentration should not exceed 60%. Higher values can damage the pump sealing rings.
Preparing the soap box for filling: Step-by-step
Before refueling, the device must be properly prepared, which will prevent leakage and ensure a uniform flow of fluid.
- Turn off the power: Remove the batteries or disconnect USB-cable (depending on the model).
- Remove the upper cover: on most models it is fixed with latches - carefully press on the side ledges.
- Remove the tank: in the soapboxes Xiaomi Mijia it is attached to the clamps, in the Viomi V3 - on the thread.
- Rinse the tank: use warm water without detergents. To remove plaque, you can use vinegar solution (1: 1), but not more than 1 time per month.
Note the seal ring on the neck of the tank. If it is deformed or covered with plaque, replace it (parts can be ordered from official Xiaomi dealers). Also check the feed tube - it must be clean and not clamped.
Power's out.
Top cover removed.
Removed and washed the tank
The sealing ring checked.
The feed tube is cleaned.-->
Step-by-step instructions for filling soapboxes
Now, the basic process is that the instructions are universal for most models, but we'll give you some nuances for popular devices.
1.Pouring liquid into the tank
Fill the tank to no more than 80% of its volume, which will prevent overflows when heating the liquid or shaking. For models with a foam generator (for example, the Viomi V3 Pro), use a special MAX FOAM tag.
Tip: if you fill a thick product, first dilute it with water in a ratio of 1: 1. For antiseptics, dilution is not required.
Installation of the reservoir
Carefully insert the tank back, aligning the grooves. In threaded-mounted models (Viomi), twist it to the point, but without effort - tug can damage the plastic. Make sure the feed tube is not twisted.
3. Leakproofness check
After installation, flip the soapbox (if the design permits) or tilt slightly. If the fluid does not leak, you can connect the power. In models with a level indicator (Xiaomi Mijia 2), wait for the sensor to update the data (usually 10-15 seconds).
4. Test run
Put your hand up to the sensor at a distance of 5-10 cm. The device should give out 1-1.5 ml of liquid at a single press. If the dose is too small or large, adjust the settings in the Mi Home application (section Dosing → Dosage settings).
| Soapbox model | Volume of the reservoir | Recommended liquid | Features of refueling |
|---|---|---|---|
| Xiaomi Mijia Automatic Soap Dispenser | 300 ml | Liquid soap, antiseptic (up to 60% alcohol) | The tank is removed by pressing the side latches, and it supports dosage adjustment in the app. |
| Viomi V3 | 400 ml | Foam-forming soap, shower gel | There's an Eco mode to save fluid. |
| Xiaomi Smart Foaming Hand Soap Dispenser | 250 ml | Foaming agents only | It requires a mandatory dilution of thick gels. The sensor works at a distance of 8 cm. |
⚠️ Warning: If the soap box is not evenly or bubbled after filling, it is a sign of air entering the tube. To fix the problem, remove the tank and repeat the installation by slightly shaking it before mounting.
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If the soap is used in the bathroom, place it away from the sources of steam (for example, the shower cabin).
Common Mistakes and How to Avoid Them
Even experienced users sometimes make gas station errors that lead to breakdowns or malfunctions, and the most common are:
- 🔋 Ignoring battery type: Xiaomi soaps require alkaline batteries AA. Salt or rechargeable (Ni-MH) may not provide enough voltage for the pump.
- 💧 Fluid overflow: If the tank is filled to the full, when heated, the liquid expands and can flow through the valve.
- 🧴 Mixing of different means: residues of old liquid in the tube can react with a new one, forming a sediment.
- 🔄 Late cleaning: if the soapbox is used daily, the tank and tube should be washed once every 2 weeks.
Critical error: using particulates (like hand scrubs) that clog the pump filter and have to be replaced is not a guarantee!
If the soap box stopped working after refueling, reset the settings: hold the power button for 10 seconds (for models with a button) or restart it through the Mi Home app (Device → Settings → Reboot).
What to do if the soap does not give out liquid?
How to care for Xiaomi soap: maintenance tips
Regular care extends the life of the device and prevents breakdowns.
- 🧽 Clean the tank: once a month, wash it with warm water with vinegar (1:3!
- 🔧 Sensor check: wipe the infrared sensor with a dry wipe once a week. Dust or splashes can block the trigger.
- 🔋 Battery replacement: Even if the soap is working, change the batteries every 6 months - discharged cells reduce pump power.
- 🌡️ Storage: If the device is not in use for more than a week, drain the liquid and rinse the tank.
For models with a foam generator (Viomi V3 Pro), additionally clean the spray mesh with a toothbrush. If the foam has become less thick, this is a sign of clogging.
In the Mi Home app, you can set up automatic shutdown of the soapbox at night (Schedule section), which will save battery power and prevent accidental triggers.
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Use only original or recommended detergents – this ensures that the pump and sensor will work smoothly throughout their lifetime.
What to do if Xiaomi soapbox breaks after refueling
If the device stops working or gives an error (for example, flashes red), first eliminate software failures:
- Reboot the soapbox through the app or reset button (if any).
- Check the connection to Mi Home – sometimes crashes are caused by loss of communication.
- Update the firmware to the latest version.
If the problem persists, inspect the device for mechanical damage:
- 🔍 Leaks: Check the O-ring and tube for cracks.
- 🔊 Extraneous sounds: gnashing or humming when the pump is working indicates a foreign body hitting.
- 💡 Indication: If a red LED lights up, it could mean a tube clog or a level sensor malfunction.
For warranty models, contact Xiaomi Service Center. If the warranty is over, you can Attempt self-repair (for example, replace the pump or tube), but this requires skills with small electronics.
⚠️ Warning: Do not disassemble the soapbox if it is still warranty, this will cancel it. Also avoid using superglue to repair cracks: it can damage the plastic when in contact with liquid.