Is there any rust spot on the plate of the Xiaomi Electric Glass Kettle?

Most small spots found on surfaces are limescale, such as yellow spots, pockmarks, or rust spots, which can be effectively cleaned using citric acid or vinegar solutions. If these methods do not work, using sandpaper or cleaning cloth can be attempted for tougher stains. Minor rust occurrences are common in daily life and generally do not pose health risks.
The principle behind stainless steel rusting involves its composition as a crystalline solid with a uniform atomic arrangement. Besides iron, it contains elements like chromium, nickel, and titanium. Chromium and nickel play crucial roles in forming a passivated film that protects stainless steel from corrosion.
Water hardness varies by region, resulting in either hard or soft water. Hard water, containing impurities, leaves deposits after heating. These impurities can range from hard minerals to softer substances, depending on the water's composition and geographical location.