Clean the entire surface under top of the oven. If possible, invert spiders so that they get closer to the fire source. TOP Follow the above cleansing procedures. Set the electric burners on the highest setting until they glow red after a few minutes. There are various customs with respect to cooking milk and meat dishes in the same oven.
Some people only cook meat in their ovens, and have small toaster ovens for milk dishes.
A second custom is to wait 24 hours between the cooking of milk and meat. The most lenient custom is to wait until the oven has cooled between the cooking of milk and meat. If there is any spillage of meat, the oven may not be used for milk before it is cleaned thoroughly and set at top heat, and vice versa. It is wise to line the oven bottom and check the broiler for any spillage before cooking. Allow the water to vaporize into steam.