Modern robot vacuum cleaners from Xiaomi and the Mijia ecosystem are complex devices that combine dry suction and wet floor cleaning. However, unlike classic cleaning vacuum cleaners, the launch process requires the right sequence of actions, ranging from physical installation of the module to software setting in the smartphone. Many users mistakenly believe that it is enough to simply pour water into the tank, but the device’s security system often blocks the start without correctly identifying accessories.
Turning on wet cleaning mode depends on the specific model of your gadget: whether it is the flagship Xiaomi Robot Vacuum X20+, the popular Mijia 1S or more advanced versions with automatic mop lifting. In this article, we will discuss in detail the algorithm for activating the function, look at the nuances of working with the Mi Home application and explain why a robot can refuse to start washing even if there is water in the tank.
Before you start any manipulations, make sure your device is fully charged and has the latest firmware version. The robot software is constantly updated, adding new water distribution and mapping algorithms, which is critical for the correct operation of the wash function. Ignoring updates can cause the control interface to differ from what is described, or some options may not be available.
Preparation of equipment and installation of the module
The first and most important step is to physically prepare the device, and the robot must "understand" that it has a wet cleaning module attached to it, and most of the Roborock and Mijia series will require a special water tank dust collector or a separate mop module if the design involves separating them.
The installation process requires care: you need to remove a standard dry dust container and replace it with a combined unit or install a mop platform at the bottom of the body. Once the device is installed in the docking station, the robot usually emits a characteristic audible signal or a voice message confirming that the cleaning mode has changed. If this does not happen, check the density of the contacts.
It is also important to properly prepare the mop itself. The tissue tissue should be slightly moistened before starting work, especially if it has dried after previous use. The dry wipe may not immediately start to leak water, which will lead to a false impression of a malfunctioning supply system.
☑️ Pre-launch checks
Some models, such as the Xiaomi Vacuum-Mop 2 Pro, have intelligent recognition of the type of container installed. Once you insert the water tank, the interface automatically changes in the application, suggesting that you choose the wash settings. If you use the model without automatic determination, you must move to the next step.
Setting up parameters in the Mi Home app
The main control of the robot functions is through the Mi Home app (or Xiaomi Home). Once the robot is connected to Wi-Fi and added to the list of devices, you need to go to the card of a particular vacuum cleaner, and this is where the key settings for activating and fine-tuning the wet cleaning are hidden.
In the main control menu, find a button or icon that indicates the cleaning modes, often it looks like a drop of water or a mop, and if you click on it, you'll be taken to the water intensity settings menu, and you'll find different levels that are selected depending on the type of flooring and the degree of contamination.
- 💧 Low level: suitable for daily maintenance cleaning on laminate or parquet where excess moisture is undesirable.
- 💧💧 Medium level: optimal balance for tile and linoleum with medium pollution.
- 💧💧💧 High level: used for severe contaminants on water-resistant surfaces such as porcelain porcelain.
- 🚫 Disconnected: dry cleaning mode, water supply is completely blocked.
Note the "Accurate Adjustment" feature. Some advanced models offer not only a step-by-step, but also a smooth water rate setting, which allows you to achieve the perfect result when the floor becomes clean but dries out in minutes. Remember that for models with a smart tank, the setting in the application directly controls the pump, while in gravity tanks only the valve opening is regulated.
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Use distilled or filtered water to extend the life of the pump and prevent scale formation in thin feed channels.
Strategy Choosing and Zoning Cleaning
Today's robot vacuum cleaners have a powerful processor that allows you to build detailed maps of the room, and wet cleaning is integrated with the navigation system, so you can set the device so that it only washes the floor in certain rooms or, conversely, bypasses carpets and recreation areas.
You can use zoning to implement cleaning scenarios, and you can use a zoning function on a map of your home to highlight a rectangular area or draw a random figure, telling the robot to do a wet cleaning, which is especially useful in the kitchen or hallway, where pollution is the fastest.
Virtual Walls or No-Go Zones are also available, and activate this mode to indicate where a wet mop robot is not allowed to enter, critical to protecting long-pile carpets, electronics, and wooden boards that may be affected by moisture.
| Setup parameter | Description of function | Recommended use |
|---|---|---|
| Water intensity | Adjustment of the volume of fluid supplied | Depends on the type of floor covering |
| Cleaning procedure | Choice: First vacuum, then wash | For mixed types of pollution |
| Bypassing carpets | Automatic rounding or lifting of the mop | For homes with lots of carpets |
| Y-track mode | Mop movement along a complex trajectory | To remove dried spots |
And the silent cleaning mode, which when activated, reduces speed and suction power, allows water to better dissolve pollution, is ideal for night cleaning or when there are people in the house who are sensitive to noise.
Starting the process and managing in real time
Once you have set up all the settings, you can go to the direct start. The main page of the application usually has a large Start or Clean button. If you have pre-chosen wet cleaning mode or installed the corresponding module, the robot will immediately start working in the specified mode.
As you work, you can monitor progress in real time. The app shows the current cleaning area, the remaining battery charge, and the water level in the tank. If the robot finds that there is not enough water, it will return to base (if the model supports autodosing) or stop and send a notification to your smartphone.
⚠️ Warning: Do not try to put water in the tank while it is installed in the robot. This can short-circuit electronic contacts and the device will fail.
For models with automatic mop lifting (such as the X20 or Omni series), the launch process looks even more automated. The robot will independently determine the presence of the carpet and raise the mop platform a few millimeters to avoid wetting the pile while still vacuuming.
If you notice that the robot is skipping areas or leaving too much moisture in the cleaning process, you can pause, adjust the intensity settings, and start the device again, and the robot's memory will retain the route it has already traveled, and it will continue cleaning from the stop or start again, depending on the logic chosen.
Extended functions: Y-shaped trajectory and repetition
Owners of top-end Xiaomi and Roborock models have access to advanced motion algorithms. Standard forward-back motion is effective for collecting dust, but a Y-shaped trajectory is better for removing dried-up dirt spots. When this option is turned on, the robot makes additional diagonal movements, simulating the work of a person who rubs the spot.
This mode is activated in the same cleaning settings, which is usually only available when the wet cleaning module is installed, and the Y-twin trajectory increases the overall cleaning time, but significantly improves the quality of floor washing in the kitchen or in the hallway.
How does a double sink work?
Also worth mentioning is the schedule feature, which means you can set the robot up to do the wet cleaning automatically at certain times, like when you're not at home, so you don't have to manually start the process every time you come back, and you can catch the already clean, dry floors when you come back.
Troubleshooting and maintenance
Even if you set it up properly, you can have situations where wet cleaning doesn't start or doesn't go well, and one of the most common problems is that there's no water supply, first of all, check if the membrane in the tank is dry, and if the robot hasn't been in washing mode for a long time, the channels might clog.
To clean the system, it is recommended to remove the tank, rinse it with warm water and let the napkin soak for 10-15 minutes. Also check the HEPA filter: if it is wet, the robot can block the start of the motor to protect the electronics. The filter must be completely dry before each dry cleaning, but for the washing mode in some models there are special filters with a water-repellent coating.
- 🔍 Water sensor error: If the app reports an error, wipe the contacts on the tank and in the robot body with dry cloth.
- 🧹 Mop stuck: check if the hair or threads are wound on the mop shaft if the model involves rotation.
- 📉 Low charge: robot won’t start wet cleaning if battery power is below 20% as the washing process is energy intensive.
⚠️ Attention: It is strictly forbidden to use hot water, chlorine-containing products or aggressive chemicals in the tank of a robot vacuum cleaner. This destroys rubber seals, pumps and plastic parts of the tank. Use only water or special products for robotic vacuum cleaners.
Regular maintenance includes not only washing the tank, but also drying the tissue wipe after each cleaning. A closed wet wipe is the perfect environment for bacteria to multiply and produce an unpleasant odor that will spread throughout the apartment during work.