Why are there limescale and a small rust spot at the bottom of the Xiaomi Smart Kettle 2 Pro?

1. The white spots at the bottom of the Xiaomi Smart Kettle 2 Pro are limescale deposits caused by the hardness of the running water, primarily from calcium carbonate and magnesium carbonate; 
2. The Xiaomi Smart Kettle 2 Pro is made of standard 06Cr19Ni10 (SUS304) material, which has excellent anti-rust properties and fully meets the normal usage conditions of the kettle. The rust spots could be caused by reactions between other substances in the water and the stainless steel. You can try cleaning it with white vinegar.