PerfectClean 

Exclusive to Miele
Unique non-stick effect for effortless cleaning 
Cleaning made easy: many components in your Miele oven, such as the oven compartment, baking trays and baking and roasting racks, feature a patented surface finish with unique non-stick properties. Persistent soiling is easily removed using water with a dash of washing-up liquid and a sponge. 
Images serve as examples to illustrate the product benefit. Actual feature may vary per model.