Why does the Xiaomi Automatic Soap Dispenser 1S have a notch on its body?

The small hole on the Xiaomi Automatic Soap Dispenser 1S is located in the connection area between the hand soap and the hand washing dispenser. This is a normal design, not a product quality issue.
For your reference, here is more information about the notch on the upper middle part of the main body of the device:
  1. This hole is added mainly to prevent the hand soap from overflowing, causing water to enter the dispenser and cause rust or corrosion to damage the hand washing dispenser. The notch is located as shown in the figure:
  1. To form dense foam, the device needs to pump out about 10 ml of gas each time. The connection between the bottle and the main body is very tight. If liquid splashes into the connection, the gas cannot be replenished quickly due to the good airtightness, which will affect the foaming effect of the product. You can remove the bottle and reinstall it;
  2. The Xiaomi Automatic Soap Dispenser 1S has a fixed dispense volume of 0.7 g ± 0.2 g per time, and manual adjustment is not supported. This design effectively controls the amount of hand soap used while ensuring effective cleaning, thus avoiding waste.

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