I coat everything with dielectric grease, get some from Canadian Tire. Plugs, sockets, etc...
If your cleaning things make sure your power to that circuit is off or you could start blowing fuses. Somewhere on your truck and trailer frame there should be a black wire, most often thats the ground and they just rust, faster if your closer to the salt water.
Glen & Robyn (A.K.A. Puff & Crickit) Full Timers..
2006 F350 6.0 with 3.73 gears, 4X4, Extra-Cab Long Box, Oil/Tranny/P.S. Coolers. Coolant filter. SCT Livewire.
2011 Cedar Creek 36RE, Auto levelers + too much to list..!