If your dinnerware sets have built up food and grease stains, there are a few easy ways to clean them. First, use a damp cloth to wipe down the entire set. If the stains are particularly stubborn, using a mild dishwashing detergent may be necessary. Second, use a sponge or soft cloth to dust off any loose particles or food residue. Finally, heat your oven to its hottest temperature and place the dinnerware sets inside for 10-15 minutes.