BMW X 6 F16 N55 engine oil leaks, How to fix this/ replace the cylinder head cover gasket

If the customer complains of the smell of burnt oil in the passenger compartment and traces of oil on the asphalt, this may be the reason.

[@PovertyDIY]

What did you clean the sealing area with?

[@JHAMS-007-car-repair]

I use a cutter blade and a soft cloth for cleaning.