Nikon D6 Reference Manual page 1125

Caring for the Camera
Storage
When the camera will not be used for an extended period,
remove the battery. Before removing the battery, confirm that
the camera is off.
Do not store the camera in locations that:
•
are poorly ventilated or subject to humidities of over 60%
•
are next to equipment that produces strong electromagnetic
fields, such as televisions or radios
•
are exposed to temperatures above 50 °C (122 °F) or below
−10 °C (14 °F)
Cleaning
The procedure varies with the part that requires cleaning. The
procedures are detailed below.
•
Do not use alcohol, thinner, or other volatile chemicals.
Caring for the Camera
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