Directions: Sprinkle baking soda over surface until covered, spray baking soda with white vinegar until wet and bubbly. Let sit for 20 minutes, wipe clean. Directions: Stir together baking soda, vinegar, and dish soap. Apply to oven, let sit for 20 minutes, wipe clean.
I scrub with a cleaner, and use a razor blade if the build up is bad.
Some people use a conventional oven cleaner you can buyjust about anywhere, an example is Easy off, just follow the directions on the can.
You can also use baking soda moistened with white vinegar, cover it with a damp rag and let it set for awhile to loosen anything baked on. You can apply this to the whole oven.
Wipe and rinse until clean.