I use Cramolin Red which has a lube but it's not the same lube as the manuf put in there originally. Hopefully the solvent won't wash out the grease or at least will supplant it.
We used to clean faders and rotary pots on mixers and pray the big Alps sliders would show some benefit without having to replace them. The worst thing you could use would be "Tuner Cleaner" shudder.
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