Should you out any oil/grease etc on the valve cover gasket?

[RR76]

When replacing a value(rocker) cover plus gasket, should you use any kind of grease / oil on the gasket or should it be out in clean / dry?

[ChocolateFrog]

Clean and dry on any of the ones I've ever fitted with the exception of a few dabs of gasket sealant at the corners where the cam profiles are but that'll be model and manufacturer specific.