I'll add to the no lube theme, that's what the instructions say. When I'm feeling particularly obsessive I'll clean the agate bearings and pivots of my 10-10 (circa 1980) with alcohol on a cotton swab. Works as well as ever, can't come up with an excuse to buy another.

The key elements in human thinking are not numbers but labels of fuzzy sets. -- L. Zadeh

Which explains a lot.