The topic is about switch contacts. Problem involving switch contacts are different from problems inside a potentiometer. Why? 1) Voltage and current levels are radically different. 2) Switches (unlike potentiometers) involve sharp continuity changes. Neither problem applies to potentiometers. Clearing or greasing a potentiometer has nothing to do with arcing, contact bouncing, and other power switch problems. Please don't change the topic to something completely irrelevant.
You said "grease on the switch contacts is NOT a good thing" You posted inaccurately even after others posted otherwise. That grease in sufficient quantity is a good thing
- > Bit of a rave on there w_tom - don't get your knickers in such a knot,