Why do scrambled/fried eggs stick less when cooked with butter instead of oil?
Technique is the key here. If she is using oil expect she is adding the eggs before the oil is hot, she is probably also rushing her attempt to turn/flip/scramble/move them. One of the hardest things to learn when frying eggs is to walk away immediately after adding the eggs to the hot pan.
I notice you are in Germany, I don't know what your access to the USA's &quot;Food Network&quot; is but this episode of a Alton Brown's &quot;Good Eats&quot; can show your wife &quot;eggsellent&quot; technique.
(pardon the pun, couldn't resist...)
New Links:
Good Eats: https://www.youtube.com/watch?v=Fx8up7UJv2s
Alton Brown on CBS Morning Show: https://www.youtube.com/watch?v=pD3QeyK4bJY