Light Surface Stains and Marks

• 1). Wash the plate with hot, soapy water and a soft, microfiber cloth to remove surface debris. Rinse and dry thoroughly.
  
  
• 2). Add water slowly to a cup of baking soda--mixing the water and baking soda as you add the water--to make a baking soda paste.
  
  
• 3). Apply the baking soda to the lines and wait 15 to 30 minutes.
  
  
• 4). Scrub the lines away using a circular motion and light to medium pressure with a nonabrasive scrubbing pad or soft-bristled nylon brush.
  
  
• 5). Rinse your white plate thoroughly with warm water and air or wipe dry.
  
  
• 6). Repeat with other white plates as needed.
  
  

Tough or Below-Surface Stains and Marks

• 1). Wash the plate with hot water and a soapy cloth. Rinse under running hot water and set the plate aside to cool slightly.
  
  
• 2). Mix equal parts distilled white vinegar and baking soda or salt in a sink. Place the plate in the cleaning solution and soak for at least 15 minutes.
  
  
• 3). Scrub the lines on the plate away with a nonabrasive scrubbing pad or soft-bristled nylon brush. If the tough or below-surface stains or marks don't fade, empty the sink and rinse the plate thoroughly with warm water. Refill the sink with a quart of room-temperature carbonated water and 3 tbsp. of household bleach, or warm tap water and 3 tbsp. of 3 percent solution hydrogen peroxide, and soak the plate for 30 to 60 minutes and scrub again.
  
  
• 4). Rinse the plate thoroughly with warm tap water or carbonated water. If you used bleach, rinse until you can no longer smell the bleach.
  
  
• 5). Set the plate aside to air dry or wipe the plate dry with a soft cloth.
  
  
• 6). Repeat with any other plates as needed.