I have a problem in the C2 switchboard that sulfates. They don't know how to tell me if it is the switchboard or wiring. Every two for three I have to disconnect the wiring and dry it because if I do not stop the car. You can tell me if you had something similar and some solution
I have not had or see that case, but if the problem is only sulfate, you must clean very well with clean contact, and then apply a product that repels moisture, at least here in Chile they sell it, I know other people who apply vaselin in paste to avoid this effect.