A lot of D600 oil/dust spots but what to do? Is there a guide?

McCool69 wrote:

You might want to add 'and don't mind voiding the guarantee' in that sentence.

Because the D600-manual specifically says that the end-user should never ever do any type of cleaning that involves direct contact with the sensor.

Page 304 of the manual:

Dirt that can not be removed with a blower can only
be removed by Nikon-authorized service personnel.
Under no circumstances should you touch or wipe the
filter.

And this is why so many D600-owners are upset; the only type of cleaning that removes the fluid/oil/whatever that does not move when using a blower is a type of cleaning that Nikon does not approve of.