Natural (Eco and Bio) oven cleaners:

Natural oven cleaners usually contain vegetal ingredients (e.g. concentrated lemon or orange juice) or other eco-friendly surfactants which suppose to break down the greasy soil inside the oven. There are also bio oven cleaners claiming to use a carbon and grease digesting microbial treatment to break down deposits.

Eco/bio oven cleaner are usually safer to work with and kinder for the environment. On the other hand, they act slower and provide inferior results compared with heavy duty oven cleaners, letting you working longer and harder!