The cleaners I use for the volume controls and switches in my vintage Accuphase gear are:
MG Chemicals 409B-340G Electrosolve Zero Residue Contact Cleaner - 12 Oz
MG Chemicals 404B-340G Contact Cleaner with Lubrication Silicones - 340 Grams
If Deoxit is readily available to you go for that as well.
MG Chemicals 409B-340G Electrosolve Zero Residue Contact Cleaner - 12 Oz
MG Chemicals 404B-340G Contact Cleaner with Lubrication Silicones - 340 Grams
If Deoxit is readily available to you go for that as well.