NEFF E 1544 Series Instructions For Use Manual page 71

Oven interior Clean the oven after each use, especially after
roasting or grilling.
Food remnants burn in when the oven is reheated.
The baked in remnants are very difficult to remove
once burnt in.
You can reduce the degree of soiling by frequent
cleaning using the hot-air system.
Do not clean the warm oven with any of the
cleaning products specifically designed for this
purpose.
When baking very moist cake, use the universal
baking pan.
For roasting, use the appropriate utensils (Dutch
oven).
Clean the oven before soiling becomes too heavy.
Wash out the oven cavity with hot detergent suds.
Leave the door open until the interior has dried.
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