The base must always be used together with an Omnia mold and a lid, regardless of the Omnia mold.
There must be no water in the lower part.
The stainless steel lower section heats up to > 300 °C. Place the Omnia in the middle of the oven, the lower part must not touch the edge of the oven. High temperatures change the color of the lower part.
The lower part becomes very hot and takes a long time to cool down again.