we got installed this just few days back. Yesterday is christmas, we had to cook, not heavy cooking but moderate used all the burners. 2 knobs 1 on left and 1 right melted and steel cover is gone on the edge and inner white plastic material is melted . The knobs are so cheaply made. My old stove was 25 year old but those were really sturdy. Shocked, How can manufacturer use plastic on the stove which supposed to be hot, not for just display.