Clean the toughest baked-on messes with ease! EarthStone environmentally friendly grill cleaning blocks provide powerful, effective and safe cleaning for BBQ grills, griddles, smokers and other cooking surfaces - all while contributing to a healthy environment. It's safe for use on all barbecue grill grates, including porcelain enamel, cast iron, stainless steel, steel and chrome. Usable wet or dry on surfaces of any temperature.