I'd clean off the corrosion first. I've seen a spray on product at most auto parts stores for preventing corrosion on battery terminals. It should work, but would be messy due to overspray. I *think* I've seen a tube of a gel type one too, but don't remember where. Boat store?? Mark N VIN 6820 "" <d_nieve-@xxxx> wrote: > Will contact cleaner work on electrical contacts that have a some corrosion > (powderery greenish white stuff) or is filing that down the only solution? > After getting this stuff off this there a coating that could be placed on > the contacts that'll keep them clean and not interfere with continuity > (kinda like putting pretroleum jelly on battery terminals? -I never tried it > seems it would get the compartment messy?) > > Thanks!