All you need is baking powder to clean your oven.
Step 1. Mix baking powder with a little bit of water in a mixing bowl. Using rubber kitchen gloves, mix with hands until baking powder and water become a paste.
Step 2. Open oven and rub mixture all over avoiding heating elements.
Step 3. Close oven door and turn on the oven for 5 minutes. Then turn off oven and leave overnight.
Step 4. The next morning, spray with water and wipe with a damp rag.
Pro Tip: To avoid excess cleaning in the future, place sheet of foil along bottom to catch drippings.