Use washing soda, baking soda, salt, liquid soap, borax and water to clean an oven without toxic chemicals. Use washing soda by itself to scrub the oven. Mix baking soda, salt and hot water into a cleaning paste. Mix liquid soap, borax and warm water together into a cleaning spray.
Commercially produced oven cleaners are some of the most toxic household cleaners available. EWashtenaw.org and OregonMetro.gov provide expertly researched, government-recommended recipes and instructions for many types of non-toxic household cleaners, including non-toxic oven cleaners. On these websites, learn about the cleaning powers of non-toxic household ingredients and where to find them in the grocery store.