Here is how to use baking soda to clean the inside of an unclean oven: In a basin, combine 2 teaspoons of water with 6 tablespoons of baking soda. Let the resulting paste sit overnight before applying it to the oven's walls and any grease-covered surfaces. Scrub lightly the next morning, and then use a damp sponge to rinse. Your oven will appear like new, free of grease marks and embedded filth! The use of a brush to apply the paste is perfectly acceptable in big ovens or when reaching hard-to-reach areas. 4. GRANDMAX: A Citation Lemon, with its many useful home uses, is a great natural option for removing oven grime. The method is as easy as halving the citrus fruit and scrubbing the sides with either half. Rinse with lukewarm water and white vinegar to loosen any ingrained filth, then wipe with a towel to remove any leftover residue. 5. An Oven Fat Removal Solution: A Money-Saving Trick with Liquid Black Soap Our grandparents knew that black soap was an effective natural degreaser. After ten minutes of spraying with liquid black soap, any stubborn grease on the oven walls should disintegrate. To get rid of the grease, just use a scrubbing brush. Wash it off and that's all. Credit for White Vinegar: 6 Ways to Save Money You can clean your oven properly with this excellent housekeeping tool. Take the oven rack and baking sheet out first. Combine white vinegar, two heaping tablespoons of baking soda, and a splash of water in a basin. Ideally, use a sponge to dab some of the solution onto the oven walls. After that, heat the bowl with the remaining solution in the oven at 100°C for half an hour. After the allotted time has passed, use the sponge to soak up any leftover grime. One tablespoon of soda crystals can do the trick if your oven is really oily. Lastly, before returning the racks and plate to the oven, make sure to clean them.