What you would ideally want to relube it with is probably damping grease. The problem is that that stuff can be expensive. Nye Lubricants kindly sent me their free sample pack when I asked for it nicely (I offered to pay shipping and handling, and honestly told them I wasn't a company, and I wasn't looking to adopt it for a product; they didn't actually charge shipping and handling). I think the sample pack would have enough of the heavy stuff for one or two R&P focusers. I used it for three collimation screws, and there was enough left over for about two or three more.