What grease to use on horn ring ? (noisy steering wheel)

[wishbone]

Just started using my truck after having it sitting for a while. Discovered the horn not working and it was the contact pin / ring on the wheel had oxidised causing green powder. I cleaned them up a bit and got it working but it makes a scraping noise when turning so I think it needs a little grease in there.

Dielectric grease is non conducting, so should I be looking for a conductive grease instead ?

Thanks,
Rob.

[BUSHWHACKER]

You need White Lithium grease.

[wishbone]

Thanks Vince.