Remove oven racks and any loose debris from the oven.

In a small bowl, mix together the baking soda and water to form a thick paste. Adjust the consistency as needed.

Spread the baking soda paste evenly over the interior surfaces of the oven, focusing on areas with heavy grease and grime buildup. Use a sponge or brush to apply the paste.

Let the baking soda paste sit on the oven surfaces for at least 12 hours or overnight to allow it to penetrate and loosen the dirt.

After the waiting period, dampen a clean cloth or sponge with water and wipe away the baking soda paste from the oven surfaces. Use gentle scrubbing motions to remove stubborn stains.

Once the baking soda paste is removed, squeeze the juice of a lemon over the oven surfaces to help neutralize odors and add a fresh scent. You can also place lemon slices inside the oven for extra fragrance.

Rinse the oven surfaces with clean water to remove any remaining residue.

Dry the oven surfaces thoroughly with a clean towel.

Replace the oven racks and enjoy your freshly cleaned, nontoxic oven!