UPDATE:
I tried cleaning the lens's of the bins (i wouldnt try it with my new pair) with the LCD cleaner and the anti-static cloth provided.................WORKED A TREAT.
The dirty greasy rings around the edge of the lens came right off.
The old dogs have a few yrs left in them yet.
Paul C
My next scope is going to be a Vixen VMC200L Catadioptric OTA