No, you should not wash an electric toaster with water. Electric toasters are electrical appliances, and water is a conductor of electricity. Mixing water with electricity can be extremely dangerous and may cause electric shock or damage to the toaster.
If your toaster has removable crumb trays or parts that can be washed, you should follow the manufacturer's instructions and only wash those specific parts. Typically, these parts are designed to be safe to wash with water.
To clean the exterior of the toaster, you can use a damp cloth, but make sure the toaster is unplugged and completely dry before using it again. If the toaster is heavily soiled or has burnt-on residue, you can try using a mild cleaning solution specifically designed for kitchen appliances, but always avoid spraying or immersing the electrical components in water.
Remember, safety is essential when dealing with electrical appliances, so always unplug the toaster before cleaning or maintaining it, and read the manufacturer's instructions for proper care and cleaning.