Limescale is a hard, chalky deposit that forms when water containing high levels of calcium and magnesium evaporates. It commonly appears in areas where water is heated, such as in kettles, boilers, and pipes. Over time, limescale can build up, leading to reduced efficiency in appliances and potential blockages in plumbing systems. This mineral buildup is often found in regions with hard water, which is water that has a high mineral content. To remove limescale, various cleaning products and methods, such as vinegar or commercial descalers, can be used. Regular maintenance can help prevent significant limescale accumulation.