If you mean the classic old-fashioned oven-cleaning method, one simple approach is:
Remove the oven racks and loose crumbs.
Make a paste from baking soda and a little water.
Spread it over the cool oven’s interior, avoiding heating elements and vents.
Leave it overnight.
Wipe away the loosened grime with a damp cloth or sponge.
For stubborn spots, use a little white vinegar on the residue, then wipe clean.
Safety: Never mix vinegar with bleach or commercial oven cleaners, and make sure the oven is completely cool before cleaning.
