Personally, I'd just pull the pivot screw, pull everything out, clean everything and reassemble. Make sure to use blue Loctite on the pivot screw.

Alternatively, some spray electric contact cleaner would probably work.

While I am a longtime happy user of Tuf-Glide, FWIW, I have been using KPL for pivots for a bit, testing, and am happy with it. https://knifepivotlube.com/