How do I clean the oven and accessories to prevent smoke and grease buildup?

Always slide the crumb tray under the bottom heating elements while cooking and clean it after each use. Clean all accessories from grease buildup, including the crumb tray and the interior of the oven, before each use. For deep cleaning, let accessories soak in warm, soapy water overnight and scrub with a non-abrasive brush or sponge. (Page 8)