How To Clean Copper Ceramic Pans. Add salt to the sides, scrub with sponge. Add three teaspoons of soda, pour hot water and cook it for about 15 minutes.
After two hours, use a soft sponge and rub the ketchup into the copper before you rinse it clean. Allow the ketchup to sit for about two hours.
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Avoid scrubbing it with an abrasive brush or sponge, especially if your pan is new, as it may damage its surface. Before you begin, make sure your ceramic pan is completely clean.