Press the "Clear/Off" or similar button to ensure the Advantium oven is off. Unplugging the power cord from the wall is unnecessary. Open the door. Allow the inside to cool down and air out if you just used the oven.
Run warm water from a faucet into the small bowl. Add enough dish soap to create suds and bubbles. Stir the solution. This soapy mixture will help to breakdown the splatter stains.
Dip the cloth in the soapy water. Wring dripping and excess water back into the bowl. Wipe down the stains on the oven's walls, ceiling, floor and turntable plate. Be sure you are collecting the large and small food particles as they fall to the bottom. Periodically shake food debris from the cloth off into the trash can.
Rinse the cloth in the sink. Wipe down the interior of the oven, getting stray food particles as well as residual soapy water. You may have to repeat this step, by re-rinsing the cloth two to three more times, until the splatter is gone.