Xiaomi’s oral hygiene devices and sub-brands like Mijia or Soocas are known for their reliability and tightness. But over time, even the best-quality appliances require maintenance: replacing the battery, cleaning the internals from mold or cleaning leaks. The question of how to open a Xiaomi irrigator becomes relevant when standard cleaning methods stop helping.
These devices are designed to be IPX7-standard moisture-resistant, meaning that there are no visible screws on the outer surface of the case. Manufacturers deliberately hide the fasteners to prevent water from accidentally entering the electronics, which is why the opening process requires precision, understanding the mechanism and the availability of specific tools.
In this article, we will take a detailed look at the algorithm for safely disassembling popular models of portable and stationary irrigators. You will learn where to look for hidden screws, how to properly snap plastic latches and what to do if the device stopped holding a charge or supplying water.
Tools and workplace preparation
Before any electronic manipulations are initiated, a safe space must be arranged; the work surface must be clean, dry and well lit so as not to lose fine details; an antistatic mat or simply clean fabric is recommended, as plastic housings are easily scratched and electronics are afraid of static electricity.
To disassemble Xiaomi irrigators, the standard set of screwdrivers is often useless. You will need specialized tools that allow you to act on hidden mounting elements without damaging the body. Lack of the right tools can lead to chipped plastic or torn screws.
Here is a list of the equipment needed for a successful autopsy:
- 🔧 Precision screwdriver kit (cross-hatch) PH000, PH00 and slit-faced).
- 🔪 Thin metal scalpel or special mediator for opening.
- 🔥 Hair dryer (construction or household) for softening glue.
- 🧤 Tweezers with curved ends for extracting small details.
- 🧴 Isopropyl alcohol for cleaning contacts and softening glue.
Pay special attention to clean hands and tools. Fat marks can disrupt adhesion of the glue when reassembled, and dust can damage sealing gums. Before you start disassembling the irrigator, make sure it is completely discharged or disconnected from the network to avoid short circuit.
Search for hidden screws and fastening elements
The main difficulty in how to open a Xiaomi irrigator is locating mount points. Engineers hide screws under decorative elements, rubber plugs or inside logos, most often located at the bottom of the device, where the charging connector is located, or under the switch button.
Carefully inspect the body from all sides, and if you see a rubber lining on the bottom, you need to carefully tweak it and remove it, often with screws hiding underneath that hold the bottom lid or the entire structure assembled, and in some models, the screws can be hidden under serial number stickers or technical information.
⚠️ Warning: Do not use force if the part fails. The plastic in these devices is fragile, and excessive pressure will lead to cracks that will disrupt the tightness of the housing after assembly.
In some cases, the internals require the removal of a removable water tank. In models like the Mijia Water Flosser, the tank is attached to magnets or a swivel mechanism. Once the tank is removed, the pump and control board will be accessed. If the screws are not visible, the body is probably assembled on latches and adhesive layer.
The process of opening and removing the lids
If the visible screws are twisted and the body does not open, it is held on plastic latches and glue sealants. First, try to carefully twist the parts of the body relative to each other. If you hear a crunch or feel resistance, move to thermal exposure.
Use a hair dryer to warm up the joints of the body. Temperatures should not exceed 60-70 degrees Celsius so as not to deform the plastic. Heat will soften the glue, and you can insert a thin tool into the gap between the halves of the body. Move around the perimeter, gradually snapping the locks.
Key steps of mechanical opening:
- 🔥 Warm up the perimeter of the joint with a hairdryer during 2-3 minute.
- 🔪 Insert the mediator into the widest gap and carefully twist it.
- 👆 Walk the instrument along the entire seam, snapping clips.
- 👐 Separate the halves of the body, not pulling sharply so as not to damage the plumes.
Inside, you'll see the main board, the battery and the pump, and the tightness is provided by rubber pads that you need to keep intact. When you take off the front panel, be careful with the control buttons, they can be connected to the board via silicone pushers or separate contacts.
☑️ Checking before disassembly
Access to the pump and water supply system
The central element of any irrigator is the pump, which creates a pulsating stream of water. In Xiaomi devices, the pump is usually located in the lower or central part of the body and is attached by screws to the frame or plastic racks. It often requires removing the protective board or disconnecting the plumes.
If the cause of disassembly is weak pressure or extraneous noise, first inspect the inlet and outlet pipe of the pump. There is often a buildup of scale or plaque residues that clog the system. Carefully disconnect the silin tubes, trying not to damage their fragile ends.
Technical characteristics of a typical pump in irrigators:
| Parameter | Meaning | Description |
|---|---|---|
| Type of pump | Electromagnetic | Creates pulsations due to the movement of the piston |
| Tension. | 3.7V - 5V | Depends on the battery model. |
| Frequency | 1200-1600 times/min | Optimal for cleaning gums |
| Materials | Plastic/Resin | Requires careful cleaning |
When you dismantle the pump, remember the orientation of the pipe connection. The mixing of the input and output will cause water to not flow into the tank or flow into the housing. Use isopropyl alcohol to flush the pump's internal channels if they are contaminated.
Why is the pump buzzing?
Battery replacement and electronics maintenance
One of the common reasons for disassembly is the loss of battery capacity. Over time, lithium-ion batteries degrade and the irrigator stops holding charge. Xiaomi models often use standard 18650 elements or special flat Li-Po batteries connected to the board via a connector or solder.
To replace the battery, you need to carefully disconnect the connector from the motherboard. If the battery is glued, use a plastic card to separate it, preheat the landing site. Never pierce the battery or heat it directly with an open fire.
When working with electronics, follow the following rules:
- 🔋 Disconnect the battery first to de-energize the charge.
- 💧 Avoid getting moisture on contacts and chips.
- 🧹 Clean oxidized contacts with a soft brush and alcohol.
- 🔌 Check the integrity of the wires before connecting the new battery.
If you're changing your battery to a similar battery, make sure it's the same size and capacity as the original battery. Installing a larger battery may not be physically possible, and a smaller battery may reduce your battery life. After you replace it, check the device before you finally build it.
Assembly, sealing and testing
The final step is reverse assembly, which requires as much precision as disassembly. Before connecting the halves of the body, make sure that all sealing gums are in their grooves and not clamped. Any crease on the rubber band will be the way for water to enter the electronics.
To restore tightness, it is recommended to use a special adhesive sealant for electronics (for example, B-7000), apply it with a thin layer on the joint, avoiding getting into the housing. After connecting the parts, the device should be fixed with rubber harnesses or load for 12-24 hours until completely dry.
⚠️ Warning: Do not test the leakage immediately after assembly under a strong jet of water. Let the glue fully polymerize, otherwise moisture will destroy the connection when you first turn on.
Once dry, run a test run without water to check engine performance and indications. Then fill the tank and turn the device on, pointing the jet into the sink. Carefully inspect the seams for droplets. If everything is dry, assembly can be considered successful.
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Quality sealing is critical, and using poor-quality glue or haste to assemble will cause the electronics to fail on the first contact with water.
Frequent problems in disassembly and their solution
In the repair process, users often face unforeseen difficulties, such as screws can be slimmed together, and plastic can be too brittle in the cold. If you can't unscrew the screw, drop some rust solvent on it or heat the screwdriver sting to better hook the screwdriver.
Sometimes, after assembly, the device doesn't turn on, which may mean you forgot to plug in the plume of the button or the water level sensor, in which case you have to reopen the case and recheck all connections, and there may be a problem with the safety mechanism, which blocks the launch without a reservoir installed.
The main mistakes that should be avoided:
- 🚫 Using superglue (cyanacrylate) instead of an elastic sealant.
- 🚫 Assembly of the device with wet insides.
- 🚫 Ignoring the order of removal of seal layers.
- 🚫 Use of metal tools near the battery.
If you are in doubt or the device is warranty, it is better to contact an authorized service center. Self-opening almost always leads to the loss of warranty obligations of the manufacturer.
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Before the final gluing of the case, make a test run "on weight", connecting the contacts of the battery and board manually to make sure the system is working.