Corrosion in Anderson Plugs

I've just noticed that I have a bit of green copper corrosion in a couple of my Anderson Plugs. I've given them a good soak and spray with a bicarb and water solution (about a tablespoon in a couple of litres on water), then a thorough rinse in fresh water.

I'll then spray with Lanaguard, Inox or similar. I do this from time to time, but obviously not often enough.

Will this solve the problem?

How important is it to get all the green off, or will the bicarb neutralize it enough if there is a little left.