Cheap, Easy and Safe Oven Cleaner
Box of baking soda
white distilled vinegar
Sprinkle a thick layer of baking soda over the bottom of the oven. fill spray bottle halfway with vinegar and rest of the way with water. Shake and mix the solution. Spray the baking soda in the bottom of oven with diluted vinegar spray. Use enough to make the baking soda damp. Spray every few hours to keep oven cleaner damp and allow it to sit overnight.
Wet clean cloth and scrub your oven with your homemade oven cleaner. Wipe the grime out with a clean, damp cloth. Rinse several times and make sure to get all the baking soda residue out.
* You can use this as a stove top cleaner as well