1. Disinfect. If your oven is self-cleaning, follow the manufacturer’s how-to. If it’s not, wipe the interior with a damp cloth. To soften caked-on gunk, fill a casserole dish halfway with water, add the juice of 3 lemons plus the rinds, and bake at 350° for 1 hour. Let cool for 15 minutes, then apply a paste of baking soda and water to all sides with a nonabrasive sponge. Wet the sponge in the lemon water, then scrub. Wipe clean with a damp paper towel.
2. Vacuum up debris. Pull the unit away from the wall and, using the hose attachment, remove crumbs and dust from the floor. Push it back in.
3. Scrub the stovetop. Apply a paste of equal parts baking soda and dish soap plus a few drops of water. (This is safe on any cooktop, electric or gas.) Let sit for 10 minutes, then wipe thoroughly with a damp cloth. Buff dry.
4. Refresh the racks. Place the racks and grates in a plastic garbage bag, spray generously with a degreasing cleaner (like Simple Green), and tie the bag closed. Let sit for 1 hour, then rinse each piece in a sink filled with hot, soapy water.
5. Wash the exhaust. To degrease the overhead filter, remove it and soak it for 15 minutes in a sink filled with hot water and a scoop of OxiClean. Rinse and dry. Next, clean the piece on the wall: Apply a paste of baking soda and dish soap and let sit for 10 minutes. Wipe clean with a soft sponge and buff dry.