Prepping A New Instrument Cluster

I have a new instrument cluster for my son's 66 Imperial thanks to @detmatt. I have a couple of questions before the install. First, I am wondering if the odometer/speedometer should be lubricated, if so what are some recommendations for lube types?
Secondly, has anyone had experience with servicing / cleaning these clocks? I would think after nearly 60 years it could stand a good cleaning and some lubrication. Experiences and ideas would be appreciated.
Author: 66/440