For decades "Cremlon" was the cleaner of choice. Environmental rules forced changes in the formula, then the product was sold to other manufactures. Last time I checked it was available from ITW Chemicals. A more available and popular product is "DeoxIT" from CAIG Labs. "DeoxIT" has several products that to different tasks.
Well the old tuner cleaner in the old tv days but now its all digital so thats out .
But on most electrical work i use Isopropyl Rubbing Alcohol we use it to clean anything once it drys its safe . Years back we used it to clean high voltage splices the semi con before the kits they sell today that use the wipes in the cans .
Heres what you lube with olive oil its conductive .