No, you can throw your Noalox , Deoxit Gold, Silver conducting grease, vaseline etc out as all are just petroleum based. It's personal preference but i do apply a dab of Di-electric grease to the the top and bottom cap threads. It's not for conductivity (nor was Noalox or Deoxit Gold for that matter).
There was always (and still is) misconceptions about why Noalox, Di-electric grease, Deoxit Gold, silver conducting grease or Vaseline aid electrical conductivity. It's not because any of them are great conductors, it's because they shield the brass (or aluminum or stainless) from oxygen and moisture, both of which quickly corrode and tarnish the base metal which impedes electrical flow. With the new Triplated Rhodium contacts, their is no corrosion or tarnishing, so you can throw your coatings/cleaners away.
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