Owning a smart home from Xiaomi greatly simplifies everyday life, making hygiene procedures automated. However, even the most advanced device requires periodic maintenance, and one of the most frequent requests of users is the question of the correct replacement of consumables. Incorrect fluid replacement can lead to a break in the pump, clogged nozzle or malfunction of level sensors.
In this article, we will discuss in detail the process of replacing soap in automatic dispensers such as Mijia Automatic Induction Foaming Hand Washer and their newer versions. You will learn not only about the basic actions, but also about the technical nuances that will help to extend the life of your gadget. Careful adherence to proportions and clean components is the key to the stable operation of the foaming system.
Many owners experience a device that stops feeding foam or flashing the light immediately after refueling, and often it's not because of a breakdown in the electronics, but because of a breakdown in the mixing technology or the presence of air traffic jams in the system, and we'll look at how to avoid these errors and ensure that the home is protected from germs.
Choosing the Right Soap Solution
The first and most critical step is to find the right liquid. Xiaomi’s smart dispensers are designed to work with special concentrates that have a certain viscosity and surface tension. Using a conventional liquid soap designed for hand-held pump dispensers can cause the mechanism to fail to foam the solution or, conversely, create too thick a mass that will block the valves.
The original cartridges contain a special concentrate that mixes with water in a 1:1 or 1:2 ratio depending on the model. If you decide to use third-party products, make sure that they do not contain aggressive alcohols, oils or large abrasive particles. Oil structures are poorly flushed from the internal tubes and over time form a plaque that is almost impossible to remove without completely disassembling the device.
⚠️ Warning: Never put chlorine or acid-containing plumbing products in the tank, which can eat up plastic seals and damage the fluid level sensor's electronic contacts.
When choosing an alternative to the original bottles, pay attention to the labeling "for automatic dispensers." These products are usually less viscous and easier to aerate. If you use a concentrate, it must be diluted with water in a separate container before you pour it into the tank.
Preparation for replacement of consumables
Before you start a direct replacement, you need to properly prepare the workplace and the device itself. Make sure that the surface on which the dispenser is located is dry and stable. Wet hands or a wet countertop can lead to the device slipping, which is especially dangerous, given the presence of electronic components in the lower part of the case.
For the procedure you will need:
- 🧼 New container with soap solution or concentrate.
- 💧 Clean water (preferably filtered or distilled).
- 🧻 Paper wipes or soft rags.
- 🥣 Mixing container (if concentrate is used).
It is important to disconnect the device from the power if it is running off the grid, or remove the batteries if it is using offline mode. Although most Xiaomi models have moisture protection, getting soap solution on the open contacts of the battery compartment can cause oxidation.
☑️ Preparation for soap replacement
Step-by-step instructions for replacing the cartridge
The replacement process in models with finished cartridges (e.g., or earlier versions) is as simple as possible by the manufacturer: Take a new cartridge bottle and remove the protective cover from it, flip the dispenser upside down or stack it on its side if the design allows to minimize the leakage of residues of old liquid.
Insert the neck of the cartridge into the appropriate opening at the bottom of the device before the characteristic click. Some models require the vial to be turned clockwise to lock. Once installed, return the device to the vertical position. If you use the model with a refillable version, the process looks different: unscrew the top cover, remove the inner glass and rinse it with warm water.
Pour the prepared solution into the tank to the MAX mark. Overflow is unacceptable, because when the lid is closed, the liquid level will rise, and it can enter the electronics or pump compartment. Tightly twist the tank lid, making sure that the sealing ring is right in the groove.
What to do if the cartridge is not inserted?
After assembly, you need to calibrate the system. Press the switch on or hold your hand to the sensor several times so that the pump pump pumps fluid through the tubes and removes air. The first 2-3 portions can be watery or contain air bubbles - this is normal for a hydraulic system after refueling.
Cleaning and maintenance of the tank
Regular cleaning of the inner tank is a procedure that is often neglected, but it determines the durability of the device. Over time, the walls of the tank and the pump intake tube form a plaque of soap residues and mineral deposits from the water, which can flake off in large pieces and clog a thin nozzle of the sprayer.
It is recommended to wash the tank completely every 2-3 months or at each change of the soap solution type. To clean, use warm water and a soft detergent without abrasives. Carefully rinse the glass, paying attention to the bottom where the sediment most often accumulates. Pay special attention to the intake tube - wipe it with a wet wipe along the entire length.
| Element | Frequency of cleaning | Remedy. | Method |
|---|---|---|---|
| Outer hull | Weekly | Wet wipe. | Wipe down |
| Reservoir (glass) | Every 2 months | Warm water | Washing |
| Intake tube | Every 2 months | Soft brush | Mechanical cleaning |
| Foaming nozzle | When clogging. | Toothpick | Careful cleaning. |
After washing, make sure all components are completely dry. Assembly of a wet device can cause the residue of water to mix with the concentrate, disrupting the manufacturer's calculated proportion, which is especially important for models where mixing occurs inside the cartridge bottle itself.
Elimination: the device does not penetrate
When the dispenser is buzzing but the foam is not going, it is the most common problem after the soap is replaced. Most often the reason lies in the suffocation of the system. Xiaomi pump works on the principle of sucking the liquid, and if the tube breaks the jet, it starts to drive air. To eliminate, try to activate the sensor several times in a row, holding the device above the sink.
If simple pumping does not help, check the density of the lid and the integrity of the sealing rubber bands. Sucking air through a loosely closed tank reduces the efficiency of the pump. It is also worth checking the outlet: sometimes the dried foam forms a dense plug, which must be carefully removed with a thin needle or toothpick, trying not to damage the filter mesh.
⚠️ Warning: Do not attempt to clean the nozzle with metal objects with sharp edges. Damage to the aerator mesh will cause the device to give out liquid rather than foam, and it will be impossible to restore the correct structure of the jet.
In some cases, the problem may be with discharged batteries. At low charge, the electric motor does not develop enough power to create the necessary pressure and aeration. Even if the indicator is still burning, replace the batteries with fresh, preferably alkaline, as they provide a more stable current.
💡
Use only distilled or filtered water to prepare the solution. Tap water contains salts that quickly form scale on the heating elements (if there is heating) and mechanical parts of the pump.
Setup and integration into a smart home
Modern Xiaomi Dispensers support connectivity to the Mi Home ecosystem via Bluetooth gateway or directly via Wi-Fi. This not only allows you to track battery levels, but also receive low fluid notifications. To connect, open the app, click Add Device and follow the instructions on the screen.
You can find information on the number of remaining uses in the device settings if the model supports the meter, and the app can also remind you to replace the cartridge. Make sure the device firmware is updated to the latest version, as manufacturers often release patches that improve the algorithms of the sensor and pump.
For users who prefer automation, you can set up scenarios, for example, you can set the nightlight in the bathroom when the dispenser motion sensor is triggered, or you can send a notification to your phone if someone washed your hands in your absence, which makes the device not just a hygiene tool, but a full part of the smart home.
💡
Timely battery replacement and the use of quality water are two of the main factors that ensure the long life of your Xiaomi dispenser.