I bought a three-in-one tea maker with bright lights, and many scales similar to spots appeared on the heating plate. Are these spots harmful to people?
This is a normal phenomenon. Water contains calcium and magnesium ions, which will generate scale in the process of water heating, which is harmless to human body. Recommend several methods to remove tea scale: 1, soak in vinegar, or soak in detergent or cook for a while, and scale can be easily removed. 2. Wipe the tea stains with a sponge dipped in salt. 3. Scrub with toothpaste or broken egg shells, and then rinse with water.