Nikon NIKKOR Z 70-200mm f/2.8 VR S Lens - Manual (Page 219)

195 Technical Notes
Manual Cleaning
If foreign matter cannot be removed from the image sensor
using image sensor cleaning, the sensor can be cleaned
manually as described below. Note, however, that the sensor is
extremely delicate and easily damaged; we recommend that
manual cleaning be performed only by a Nikon-authorized
service representative.
1
Remove the lens.
Turn the camera off and remove the lens or body cap.
2
Examine the image sensor.
Holding the camera so that light falls
on the image sensor, examine the
sensor for dust or lint. If no foreign
objects are present, proceed to Step 4.
3
Clean the sensor.
Remove any dust and lint from the
sensor with a blower. Do not use a
blower-brush, as the bristles could
damage the sensor. Dirt that cannot
be removed with a blower can only be
removed by Nikon-authorized service
personnel. Under no circumstances should you touch or wipe
the sensor.
4
Replace the lens or body cap.