Non-stick surface. Never wash with steel wool or abrasive detergents to avoid damaging the non-stick surface. Do not remove burnt food with sharp objects; allow it to soften and then wash. Use only wooden or plastic accessories to avoid scratches. When cooking, the diameter of the hob should not exceed the diameter of the pot, and the flame should not exceed the edge of the bottom of the pot. Never heat an empty pot. Serving Tong Sets