How to properly pour water into the robot vacuum cleaner Xiaomi Mi: instructions with photos and videos

Xiaomi Mi wet cleaning robots have become an integral part of smart homes, but many users face difficulties when using the detergent for the first time. Pouring water is a seemingly simple procedure, but improper execution can lead to leaks, pump breakdowns or even failure of the device. This is especially relevant for owners of Mi Robot Vacuum-Mop 2 Pro, Mi Mop 2T and other hybrid devices where dry and wet cleaning are combined.

In this article, we'll look at not only basic water refill steps, but also nuances that are not covered in the official instructions, such as why you can't use regular tap water, how to avoid lime plaque at the pump, and what to do if the robot stops spraying the fluid, and you'll also find a comparative table of accessories compatibility and answers to frequent questions that arise after several months of operation.

If your Xiaomi Mi refuses to wash floors or leaves divorces, the problem may not be a software failure, but incorrect preparation of water or detergent.

Which Xiaomi Mi models support wet cleaning?

Not all Xiaomi robot vacuum cleaners are equipped with a floor washing function. The washing module is only present in special series, which includes a water tank and a microfiber wipe. Here are the main models for which this instruction is relevant:

• 🤖 Xiaomi Mi Robot Vacuum-Mop 2 Pro – flagship with laser navigation and electronic water supply control.

If your model is not listed on this list, check the package: the presence of a water tank (usually white or transparent) and a wipe with Velcro confirms support for wet cleaning. For clarification, you can see the marking on the case or in the Mi Home application in the Device → Information section.

Importantly, some models (such as the Mi Robot Vacuum 1S) have only a dry cleaning function, and trying to pour water into them will lead to short circuits and irreversible breakage.

What will you need to refill the water?

Before you pour the water, prepare everything you need, and the absence of at least one of the components can cause the device to malfunction or break.

• 💧 Distilled or filtered water is a must! Tap water contains salts and chlorine that settle on the pump and tubes.
• 🧴 Special detergent (optional) - only those recommended by Xiaomi (for example, Mi Detergent!
• 🧽 Soft fabric - for wiping the contacts of the tank and the case after refueling.
• ⚡ Charger – Make sure the robot is at least 20% charged, or it won’t start cleaning.

If you use detergent, keep the proportions: for 200 ml of water, 1-2 caps are enough (exact data are indicated on the package), exceeding the concentration will lead to abundant foaming, which can clog the spraying system.

⚠️ Warning: Never mix different detergents, even if they are from Xiaomi.A chemical reaction can damage rubber tank seals.

Step-by-step: how to pour water into a robot vacuum cleaner

The water refill process may vary slightly depending on the model, but the overall scheme is the same for all Xiaomi Mi devices with a detergent module.

1. Turn off the power. Remove it from the dock and make sure it's off (the indicator doesn't blink).
2. Remove the water tank. Most models have it on the back, and it's latched. Press the Release button and pull the tank up.
3. If this isn't your first gas station, rinse the tank with warm water to remove any remaining detergent.
4. Pour the water to the marker. There's a MAX mark on the wall of the tank (usually 200-250 ml).
5. Add a detergent (if necessary). Use a measuring cap to keep the dosage up.
6. Put the tank back in. Make sure it's firmly in place -- it's got to click.
7. Check the napkin. It should be clean and properly attached to the bottom panel.

After refueling, turn on the robot and start cleaning through the Mi Home app or button on the case. The first 2-3 cycles are recommended to be carried out without detergent to adapt the system.

If the robot does not spray water, check:

• 🔋 Charge level (should be) >15%).
• 💦 Proper installation of the tank (contacts must match).
• 🧼 Lack of air in the tubes (shake the tank before installation).

What water can be used and what water can not be used?

Water quality is not only the cleanliness of the floors, but also the life of the robot vacuum cleaner. The internal tubes and pump are sensitive to impurities, so the choice of water is critical.

If you can not use distilled water, add 1-2 drops of vinegar (200 ml) to filtered water - this will help to soften it and reduce plaque formation. However, vinegar can not be used more than 1 time a month, as it can damage rubber parts.

⚠️ Attention: If your area is very hard water (more than 7 mg-eq/l), even after filtration, it is recommended to wash the system with citric acid once every 3 months (1 tsp. per 500 ml of water). Pour the solution into the tank, turn the robot on for 5 minutes, then rinse with clean water.

Frequent Mistakes and How to Avoid Them

Even experienced users sometimes make water refilling errors that cause robot malfunctions, and here are the most common ones and ways to prevent them:

• 🚫 If you pour more than the mark. MAX, The liquid can enter the electronic components through the vents, the consequence is short circuit or error. E5 (leakage).
• 🚫 Household chemicals: Floor washing tools like Mr. Proper foam and clog the nozzles, and the consequence is that the robot stops spraying water, requires flushing.
• 🚫 If the napkin is misplaced or poorly secured, the robot will drive on the dry floor without moisturizing it.
• 🚫 Pouring water into a dust collector, some users confuse a water tank with a dust container, and the consequence is that the turbine breaks down and expensive repairs are made.

To avoid these errors, always follow the three-proof rule:

1. Check the MAX tag on the tank.
2. Check the compatibility of the detergent.
3. Check the attachment of the napkin (it should be stretched evenly).

💡

If the robot starts making unusual noises (gurgling, gnashing) during cleaning, stop it immediately and check the tank for air in the tubes. To do this, shake the tank and set it back in place.

How to care for the detergent module: tips from service centers

Regular maintenance of the wet cleaning system prolongs the life of a robot vacuum cleaner by 30-40%, and here are the recommendations given by specialists from authorized Xiaomi service centers:

• 🧼 Wash the tank after each cleaning, and the residue of water and detergent can become a breeding ground for bacteria.
• 🔄 Change the napkin every time. 2-3 Even after washing, the microfibre loses its absorbent properties.
• 🧹 Brush the nozzles once a week. Use a cotton swab or toothpick soaked in alcohol.
• 🔋 Keep the robot empty, and if you leave the water for a long time, the metal parts will corrosion.

For deep cleaning of the system (every 3 months), follow the following steps:

1. Pour into the tank a solution of citric acid (1 tsp. per 200 ml of warm water).
2. Install the tank and turn on the robot for 5 minutes in wet cleaning mode.
3. Pour the solution and rinse the tank with clean water 2-3 times.
4. Wipe the contacts of the tank and the body with an alcohol napkin.

💡

The use of hard water reduces the life of the pump by 2-3 times. Distilled water is cheap (about 50 rubles / liter), but saves hundreds of rubles on repairs.

What if the robot stopped spraying water?

If the Xiaomi Mi robot vacuum cleaner has stopped moisturizing the floor, the reasons could be both software and hardware.

1. Sometimes the sensor mistakenly shows that the tank is full, even though there is no water.
2. Reboot the robot. Hold the power button for 10 seconds, then turn it on again.
3. Clean the nozzles. They can get clogged with dust or limestone.
4. Update your firmware. In the Mi Home app, check for updates in Device → Settings → Software Update.

If these actions did not help, the problem may be:

• 🔧 Faulty pump (replacement required).
• 🔌 Oxidized contacts between tank and body.
• 🖥️ Failure in the motherboard (needs diagnosis in the service).

The diagnostic error code can be found in the Mi Home app:

• E1 is low water level.
• E5 is a leak or a spill.
• E9 is a malfunction of the pump.

⚠️ Note: If the robot shows an error E5, Remove the tank immediately and dry the contacts with a hair dryer (cold air!

FAQ: Answers to Frequent Questions