Nikon PROSTAFF - Manual (Page 10)

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Maintenance
(1) Lens cleaning
To remove dirt or fingerprints, soak gauze or lens cleaning paper (silicon-free paper sold at camera retailers) with a small quantity of absolute alcohol (available from drugstores) and lightly wipe off the affected
areas.
Wiping with a handkerchief or leather may damage the lens surface and is not recommended.
Dust may scratch the lens surface or corrode the lens.
Brush dust off using a soft oil-free brush.
(2) Scope exterior
Use a soft dry cloth to wipe off any dirt or fingerprints that might accumulate.
It is not necessary to oil the scope's surface.
(3) Windage/elevation adjustments
These adjustments are permanently lubricated. Do not attempt to lubricate them. Cover them with the caps supplied, except when adjusting them, to keep out dust and dirt.
(4) Eyepiece adjustment
This adjustment is permanently lubricated. Do not attempt to lubricate it.
(5) Power selector ring
No lubrication is required for the power selector ring.
Do not pull up or remove the rubber covering on the power selector ring.
PROSTAFF 5.indb 18-19 PROSTAFF 5.indb 18-19 2/8/2013 5:28:08 PM 2/8/2013 5:28:08 PM