Nikon D6 Reference Manual page 1126

❚❚ Camera Body
Use a blower to remove dust and lint, then wipe gently with a
soft, dry cloth. After using the camera at the beach or seaside,
wipe off sand or salt with a cloth lightly dampened in distilled
water and dry the camera thoroughly.
Important: Dust or other foreign matter inside the camera may
cause product malfunction. Damage due to the presence of foreign
matter inside the camera is not covered under warranty.
❚❚ Lens, Mirror, and Viewfinder
These glass elements are easily damaged: remove dust and lint
with a blower. If using an aerosol blower, keep the can vertical
to prevent the discharge of liquid that could damage glass
elements. To remove fingerprints and other stains, apply a small
amount of lens cleaner to a soft cloth and clean with care.
❚❚ Monitor
Remove dust and lint with a blower. When removing
fingerprints and other stains, wipe the surface lightly with a soft
cloth or chamois leather. Do not apply pressure, as this could
result in damage or malfunction.
1074 Caring for the Camera