By: Fran Mcgee Title: Oven Cleaner Categories: Tightwad, Cleaners Yield: 20 ounces 1 c Ammonia 2 c Boiling water 1/2 c Baking soda 1 c White vinegar Pre-heat oven to 200 degrees. Leave oven on for 15 minutes; turn off and leave the door closed. Fill a shallow baking pan with ammonia and place on the top shelf of your oven. fill another pan with 2 cups boiling water and place on the bottom shelf. Close oven and leave pans in for at least 2 hours or overnight. Remove ammonia and make a past of ammonia, baking soda and vinegar. Spread paste on oven surfaces, leave on for 15 minutes, and then scrub off with a sponge or steel wool. Note: Clean up spills as they happen and you won't have to do this job very often.