I use a few natural oven cleaners, both work miracles. For burnt food on the oven floor – spread baking soda, spray it with white vinegar and leave it overnight. In the morning just wipe it away, the solution should dilute the dirt.
If the entire oven is greasy and needs cleaning, the following DIY oven spray should help. The ingredients: 6 parts water, 1 part baking soda and 1 part white vinegar. First you must blend the water and vinegar and then add soda. Apply it to your oven interior and wait for 5-10 minutes. Wipe it and rinse the surface.