The enamel in the bottom of the oven can start cracking and go off as a result of static heat => Therefore, never put a silver paper of oven protection in the bottom of the oven. Do not put dishes, pans, pots or baking plates directly on the bottom.
The enamel in the bottom of the oven can be damaged if there are objects pushed back of forth on it => If you have pans or pots in the oven, you should avoid pushing them over the bottom of the oven.