Oven-Cleaner Ammonia Water Baking soda Preheat to 200° then turn off. In a heat safe glass dish, fill with ammonia and set on middle rack (about 1 to 2 cups of ammonia). In another dish, fill with boiling water and set on bottom rack (2 cups). Leave overnight. The next morning, remove dishes and wipe down the inside with a hot wet sponge first drizzled with baking soda.
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Clean your oven overnight: Instead, place ¼ cup of ammonia into an oven-safe bowl. With the oven turned off, place the bowl in the oven and let it sit overnight. The fumes from the ammonia will soften any and all gunk in the oven, so in the morning, you can simply wipe it off with a clean sponge.
How to clean your oven - Heat oven to 60. Boil a pot of water. When the oven reaches 60, turn it off. Put 1 cup ammonia on the top rack, the hot water on the bottom rack, close the door, and leave overnight. The next day, open all doors & windows, remove and keep liquids. Leave the oven open for 15 minutes. Add 1 tsp dishwashing soap (with NO bleach) & 4 cups hot water to ammonia. Wear kitchen gloves. Wipe clean with ammonia water.