Owners of Xiaomi smart devices often face the need to save on consumables, and an automatic soap dispenser is no exception. Original interchangeable cartridges, while providing the perfect foam, end up pretty quickly, and their regular purchase significantly hits the budget. Fortunately, the design of the Mijia Automatic Foaming Hand Washer device allows you to use liquid soap of your own preparation, if you choose the components correctly.
The challenge is that the dosing mechanism is designed to be specific to the viscosity of the liquid. Too thick soap can clog thin feed tubes, and too liquid will not give the lush foam that the gadget was bought for. In this article, we will discuss the chemical basis of the process and provide accurate recipes that ensure that your device will work consistently without the risk of pump failure.
Before experimenting, it is important to understand that the automatic dispenser is a particle-sensitive mechanism. Using homemade mixtures requires careful filtering and proportions to ensure that the sensor and motor are not disrupted. Below we will describe the preparation process in detail so that you can enjoy the convenience of a smart home without unnecessary costs.
The principle of operation of the dispenser and requirements for liquid
Xiaomi Mijia's smart dispenser works by mixing air and liquid inside a special penetrator nozzle. The motor creates pressure that tightens the soap solution through a thin tube, and the mesh filter at the outlet saturates the mixture with air bubbles, which is why the consistency of the source material plays a crucial role in the formation of quality foam.
If you use a regular liquid soap from a store, it's usually too concentrated for this type of device, and the high density of the solution creates excess resistance for the miniature pump, which can cause the batteries to run out quickly or even the motor to fail, and the thick mixture simply won't have time to mix with the air in the right proportion.
⚠️ Warning: Never put soap with large abrasive particles, scrubbing elements or glitter in the tank. These components are guaranteed to get stuck in the supply valve and require complex disassembly of the cleaning device.
The ideal liquid for a dispenser should have a consistency close to water, but with the same surface tension as detergents. Viscosity is a parameter that must be controlled first. Many users mistakenly believe that the thinner the mixture, the better, but this is also not entirely true: too watery solution will drain from their hands before foaming.
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The optimal temperature of the liquid for filling is room (20-25 ° C. Cold soap from the unheated bathroom may be too viscous, which will lead to a dosing error on the first use.
Necessary ingredients and tools
To make a good blend, you'll need a minimal set of ingredients that are easy to find in any supermarket or hardware store. The basic recipe is simple, but the quality of the ingredients directly affects the life of your smart dispenser. Don't skimp on basic soap by choosing the cheapest options with unknown chemical composition.
You'll need a regular liquid soap or shower gel, and it's best to choose products labeled "sensitive skin" or "hypoallergenic" because they usually contain less aggressive surfactants and fragrances that can crystallize in tubes. Distilled water is also needed, tap water is not acceptable because of its hardness salt content.
- 🧴 Liquid soap base (best transparent, without cream additives)
- 💧 Distilled or filtered water (reverse osmosis)
- 🧪 Measured syringe or cup for accurate dosing
- 🌡️ Funnel with a thin nose for a comfortable bay
- 🧻 Napkins without pile to wipe the neck
Special attention should be paid to water. Tap water contains calcium and magnesium, which when dried form scale. Inside the Xiaomi mechanism there are moving parts and narrow channels where this plaque will accumulate, gradually reducing the diameter of the passage hole. Distillate is devoid of these shortcomings and ensures the purity of the internal system over time.
Proportions and recipe for the perfect mixture
There is a gold standard for dilution that is suitable for most Mijia automatic dispensers, and the ratio of components depends on the initial density of your base soap. If you use a thick shower gel, the proportion of water will be higher than for a liquid soap.
The classic recipe is that one part of the soap takes three to four parts of water. For example, 5 ml of thick gel requires 15-20 ml of distilled water. It is critical to pour water first, and then add soap to avoid clumps and facilitate stirring without active shake, which creates excess foam in the bottle.
| Type of basic | Proportion (Soap: Water) | Expected consistency | Recommendation |
|---|---|---|---|
| Thick shower gel | 1: 4 | Liquid as milk | Shake carefully before pouring |
| Liquid soap (medium) | 1: 3 | Like kefir. | The best option for foam |
| Baby liquid soap | 1: 2 | A little squishy. | Can be used almost without dilution |
| Concentrate (professional) | 1: 6 | Water with a tinge | Requires accurate dosing |
After mixing the components, allow the solution to settle for 10-15 minutes, which is necessary to release air bubbles that may have formed during stirring. If you pour the foam mixture right away, the level sensor or feed mechanism may not work correctly on the first turn on.
☑️ Checking the preparedness of the mixture
Step-by-step instructions for filling the dispenser
The process of replacing the cartridge or refilling with your own mixture requires care, and the first thing you need to do is remove the tank from the body of the device, and to do this, take the bottle by the top and turn counterclockwise, while pulling up. Don't put too much effort into not damaging the silicone pad.
If the bottle is left with residues of old soap, they must be thoroughly washed with warm water. Mixing different brands of soap or old and new solution can lead to a chemical reaction, precipitation or changes in viscosity, which will adversely affect the pump. Wash the container 2-3 times until the traces of the old product are completely removed.
⚠️ Warning: When washing the bottle, make sure that the water does not get to the electronic contacts at the bottom of the pump lid. Although there is protection, direct moisture intake can cause contacts to corrosion.
Pour the prepared mixture into the tank using a funnel. Try to pour liquid over the wall to minimize foaming. Once filled, tightly twist the pump lid. Turn the device over and wipe the meter nose with a dry wipe, removing droplets that may have protruded when twisted.
What to do if the soap is not dosed after refilling?
Maintenance and cleaning of the feeding mechanism
Even with a perfectly prepared mixture, microscopic plaque can accumulate over time on the walls of the tubes and penator mesh, which is a natural process, especially if the soap contains fatty acids or glycerol, and regular prevention will prolong the life of your gadget.
Every 2-3 months, it is recommended to carry out a preventive flushing of the system. To do this, fill the tank with warm water (you can add a couple of drops of citric acid to remove mineral deposits) and let the device do 5-10 single dosing cycles, this will clean the internal channels and update the fluid in the tube.
- 🚿 Wash the system with warm water every 2 months
- 🍋 Use a weak solution of citric acid to remove scale
- 🚫 Avoid using alcohol or aggressive solvents inside the bottle
- 🧼 Regularly wipe the nose of the dispenser with a wet cloth
If you notice that the foam has become less lush or the jet is going to the side, most likely, the filter net at the end of the tube has clogged. Carefully remove the tube (if the design of your model allows it without completely disassembling) and rinse it under a strong stream of water. Mechanical cleaning with needles or brushes is not recommended, as you can damage the small mesh.
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Regular washing with distilled water prevents 90% of clogging problems and ensures stable operation of the motor throughout the life of the device.
Frequent errors and troubleshooting
Users who are first-time self-refueling users often make a number of common mistakes, the most common being using too much soap in the hope that the device will manage its viscosity, which leads to engine overload and batteries quickly discharge, and if you hear the buzzing but the foam is not going, the mixture is too thick.
At the other extreme, we use soaps that contain oils above normal, and some natural soaps contain large amounts of oils that, when they come into contact with plastic, can cause them to become cloudy or even corrode. Always check the composition for aggressive components that are incompatible with polypropylene and ABS-plastic.
⚠️ Warning: If the device starts to work unstable after filling with a homemade mixture, immediately drain the solution, rinse the system with clean water and return to using the original cartridge for diagnostics.
Also, keep in mind the temperature regime: Do not leave the dispenser with a homemade mixture in an unheated bathroom in the winter. Freezing the water in the tubes is guaranteed to break the thin walls of the capillaries or break the impeller pump. The storage temperature should be above +5 ° C.