The Xiaomi Double Wall Electric Kettle does not have a filtration function, so it will produce limescale when using tap water. It is recommended to choose pure water for usage.
Limescale or cloudy boiled water is caused by calcium and magnesium carbonate in tap water. If you wish to minimize the production of limescale, it is recommended to use the electric kettle with pure water. Also, please avoid using the electric kettle to boil milk, soybean milk, tea, etc. If you find limescale in the electric kettle, please add the standard limescale cleaner or a moderate amount of vinegar for soaking and then clean it with water.