A fader? As in a pot or slider? That needs "contact cleaner", not lube.

( Dave Trouser ; the people's choice - 75% agree, Thu 4 Jul 2024, 15:01, archived)

wd 40 also make a 'specialist' contact cleaner, it's good. about £12 a can i think

( MiseryCunt S P E L L C A S T I N G, Thu 4 Jul 2024, 15:06, archived)

Yeah, the "fast drying" one is good, and worth the money if you need that.
Otherwise I use 750ml "AAB" brand, cos heavy use innit.
( Dave Trouser ; the people's choice - 75% agree, Thu 4 Jul 2024, 15:36, archived)

this was about 30 years ago
My current setup gets very little use because for some insane reason there is no door for the sitting room or for the dining room meaning that Mrs Richard's can't watch drivel on the telly whilst I 'represent on the ones and twos*

*not a lavatorial euphemism
( Queef Richard's U r a 🔔🔚, Thu 4 Jul 2024, 16:11, archived)