Mineral Buildup

There are white deposits in the egg cooker. What causes this and how can it be cleaned?

The white residue is mineral deposits caused by hard water. To remove these deposits, add 1/2 teaspoon of vinegar and 1/2 cup of water to the heating tray. With the lid in place, select the "Egg" function and allow the solution to boil for approximately 10 minutes. Turn off the appliance, allow to cool completely, empty the heating tray and wipe thoroughly with a clean, damp cloth.