Nikon is excellent with their repairs and customer care. However, anything you do to attempt a repair will potentially void the warranty. I advise you not to attempt it and to just return them to Nikon.
> On April 9, 2018 at 4:57 PM Martha McClintock wrote: > > > To all binocular experts, > My husband has Nikon Monarch (10.5 x 45). The focusing dial has always > been stiff but now it is stiff to the point of being difficult to turn. I > hate to send them back at this time since birding is heating up. Has > anyone ever lubricated the dial (probably not the correct term)? With what > and how? > > Thanks in advance. > > Martha > (Usually birding in) Westford >