I use99% pure from Amazon then put a thin coat of Stabilant which is a contact enhancer , NASA has been using this fr years ,my uncle is a master technician turned me on to this years ago if you don’t move cables around often this will keep cables from oxydation for over 12 years verywell proven can also buy on Amazon
I buy the concentrate a little bottle last for years.
https://stabilant.com/NoteList.html#reviews
