My new skillet was in great shape. I seasoned it, I use wood utensils, and wash only with water and a brush. I oil it after with olive oil or coconut oi. My boyfriend burns potatoes, onions, and eggs every morning in the skillet. He doesn’t clean it for hours until I get home and clean it and oil it. I did season it when I bought it. Today I cleaned it and dried it with a paper towel but today the paper towel was black after wiping it several times. Is it ruined? What can I do if anything to restore it?