Xiaomi’s modern cleaning systems and their sub-brand Deerma have fundamentally changed the way we wash floors. Instead of constantly dipping a rag into a bucket, users can moisten the nozzle point-by-point and dose. However, many owners face difficulties in the first phase of operation, not understanding exactly how the tank opens and where exactly the liquid needs to be poured. Incorrect refilling can lead to leaks or breakage of the water supply mechanism.
In this article, we will take a closer look at the design of various mop models, including the popular Deerma TB11, TB12 and TB30 series. You will learn which water is best used to avoid clogging the nozzles, and how to properly prepare the device for operation. Also consider the nuances of maintenance of the pump, which is the heart of the spray system.
Tank design and types of Deerma mop
Before you start refueling, you need to clearly identify the model of your device. Xiaomi engineers have developed several types of humidification systems, and the method of filling them can be very different. The main differences are in the location of the tank and the mechanism of its extraction. Understanding the architecture of the device is the key to safe operation.
The most common models are those with a built-in tank in the handle or at the top of the main platform. In such devices, such as the TB10 series, the tank is often a non-removable or partially removable element. In more advanced versions, such as the TB30, a dual tank system or an electric pump with a separate compartment is used. It is important not to put excessive effort if the mechanism does not open easily, since the plastic can crack.
⚠️ Warning: Never force the tank lid off if it doesn't lend itself. Check for hidden locks or swivel mechanisms specific to your model.
And you have to pay special attention to the electric spray models. Unlike the mechanical ones, where water drips by gravity, there's a miniature pump. The tightness of the tank to the pump is critical. If you break the seal, you'll have water flowing down the handle into your hands or into the electronics, which will cause you to short circuit.
Water preparation and necessary materials
The quality of the fluid used directly affects the durability of the nozzles and pump. In the instructions for most Deerma devices, it is recommended to use ordinary tap water. However, in regions with very hard water, scale can form over time. To prevent this, many users prefer to use filtered or distilled water.
It is strictly forbidden to pour aggressive chemicals into the tank, such as chlorine-containing bleaches, acids or concentrated alkalis. These substances can eat rubber seals and damage plastic parts of the pump. If you want to add a disinfectant, choose special fluids for robot vacuum cleaners or mops with a sprayer that do not form a copious foam.
Water temperature also matters. You should not pour hot water (above 40-50 degrees Celsius), as this can deform the plastic tank and disrupt the geometry of the sealing rings. Cold tap water is the best choice. Before refueling, make sure that you have:
- 🧪 Clean water container (tap or filtered).
- 🧼 Special cleaning agent (optional, only compatible with sprayers).
- 🧻 Dry rags or paper wipes to remove spilled drops.
- 🔋 Charged battery (for models with electric pump).
Using inappropriate chemicals is the most common cause of spray system failure. Foam formed by using conventional floor shampoos can block the pump from working, creating an air traffic jam. Xiaomi recommends refraining from experimenting with household chemicals unless it is certified for use in sprays.
Step-by-step: refueling models with a removable tank
Removable tank models, such as the Deerma TB30 or some versions of the TB12, are the most user-friendly, and the refueling process is intuitive, but requires a certain sequence of steps to avoid leaks, and you first need to disconnect the tank from the main mop body.
Usually the tank is fixed by a rotary mechanism or latches. Find the unlock button or turn the tank counterclockwise to release it. Once the tank is removed, the locate hole is located for the bay. It is often closed with a silicone cap or screw cover. Open the hole and fill the tank with water to the MAX mark. You can not transfuse water above this mark, because when you install the tank back, the displaced air will create excess pressure.
☑️ Checklist for proper refueling
Once filled, close the lid carefully or put the plug back in place. Make sure it sits tightly and before the click. Now set the tank back into the mop body, combining the guides. Lock it by turning or snapping. Before cleaning, it is recommended to wipe the outside of the tank with a dry cloth to prevent moisture from entering the electrical contacts.
⚠️ Warning: When installing a full tank, be sure not to turn the mop upside down.This can cause water to leak through the vents.
It's important to check that after you install the tank, the water button or triggers work normally. If you feel resistance, maybe the tank is not fully inserted. The mechanical connection must be reliable so that the pump can pump water without suffocating the system.
Refilling models with a non-removable tank
In smaller or older models, and in some versions of the TB11, the tank can be integrated into the handle design. In such cases, the refueling process takes place without disconnecting the major parts of the device. Find the filler hole, which is usually located at the top of the handle or side, closer to the mount.
Open the filler lid. Often, this requires pressing and turning the lid or simply pulling it upwards. Use the nozzle of the pitcher or bottles to gently direct the jet of water inwards. It is especially important to take your time to avoid water pouring over the edge into the handle, where the electronics or trigger mechanics may be located.
Control the water level through a transparent window or indicator on the body. Once the level reaches the upper limit, stop pouring. Close the lid tightly. In these models, the air valve plays an important role: it lets air into the tank as the water flows, preventing the creation of a vacuum. Make sure that the valve hole is not flooded with water and is not contaminated.
What to do if the water is not coming in?
Some users prefer to use a needleless syringe or a small watering pot to fill the tanks more accurately, a good life hack to avoid spilling water on the floor or carpet during preparation, and the main thing is not to create pressure during pouring, so as not to damage the internal partitions.
System inspection and removal of air traffic jams
Once you have filled the water, the system may require primary pumping, especially for new devices or those that have not been used for a long time. The air in the pump tubes prevents normal fluid flow. To remove air, turn on the device and press the spray button, pointing the mop into the sink or on an unnecessary cloth.
The first few seconds of the nozzle can only be air with a characteristic hissing. It's normal. Keep pressing the button in short batches until you see a steady mist or a stream of water. If the water hasn't gone, check if it's out in the tank and the lid is tightly closed. Sometimes a tight lid creates a vacuum, keeping the water from leaking out - try to slightly open it and close it again.
| Symptoms. | Possible cause | Decision |
|---|---|---|
| Water drips spontaneously | The lid is loosely closed or the valve is clogged. | Check the leakage, clean the nose. |
| No spray, pump buzzing | Air traffic jam or empty tank | Pump the system, add water. |
| Weak fog pressure | Nozzle clogging or low charge | Clean the nozzles, charge the battery |
| It's leaking out of the handle. | Damaged tank or overflow | Stop use, check integrity |
Regularly checking the system will help avoid unpleasant surprises during cleaning.The spray nozzles are very thin, and even a microscopic motif can disrupt their operation.If you notice that the jet is hitting to the side or the spraying has become uneven, it may be time for preventive cleaning.
Water supply system care and prevention
For Xiaomi Deerma mop to last, it needs to be taken care of. After each cleaning, it is recommended to drain the remaining water from the tank. Stagnant water is the ideal environment for bacteria to multiply and mold to form, which will cause an unpleasant smell in the next operation.
Once a month, do a preventive cleaning of the tank. Wash it with clean water, you can add a little citric acid if you notice a white coating (scale), carefully rinse the tank after cleaning. Pay special attention to the area around the lid and seals, which is where dirt accumulates most often.
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Keep the mop upright or suspended, which will prevent any water from leaking out and keep the sealing rubber bands in shape.
If you plan to stay off the mop for a long time (like going on vacation), be sure to empty the tank completely and dry the system. Leave the tank lid open during storage so that there is no moisture and mustyness inside. The electric pump will also thank you for dry storage, as the contacts will not oxidize.
⚠️ Warning: Do not store a mop filled with water at negative temperatures (for example, on an unheated balcony in winter). Frozen water will expand and rupture the plastic tank or damage the pump.
These simple maintenance practices will help keep the spraying efficiency and hygienic throughout your life, and remember that proper operation starts with the right refill.
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Emptying the tank after each cleaning is the main rule that prevents the appearance of odor and mold in the system.