Is the George Foreman rotisserie dishwasher safe?

The manufacturer of the George Foreman rotisserie ovens, the Baby George and the Big George, doesn't explicitly state whether the ovens are dishwasher safe. It only recommends that oven accessories are cleaned in hot, soapy water, rinsed and dried completely.

Before cleaning, the oven should be unplugged and completely cooled. The outside of the machine should be wiped with a damp cloth and dried. The interior of the oven can be wiped with a damp sponge. Consumers should not use scouring pads or abrasive cleansers to clean the inside of the oven. Instead, a nylon bristle brush can be used to remove stubborn stains or hardened food.