ADCX Rob posted:SteamWolf posted:...While you've got everything apart, might as well clean the shaft underneath and re-dielectric the copper contact.
I wouldn't use an insulating compound or material here - performance may suffer.
I've never had an issue with silicone grease on any electrical component and have flooded non-weathertight connections with the stuff on vehicles.
Edit: also, mine had some kind of gunky grease on it before, and the voltmeter showed another 5vAC when I triggered the whistle after reassembly.