Comment by bluGill

That is step one. However that is rarely enough: the corrosion eats through the chrome plating on the steel (chrome is a good conductor, steel makes a great spring), and that rusty steel is a poor conductor. Even if you polish the steel, it will rust again soon. (chrome plating requires nasty chemicals, not something to attempt at home - I suspect you could silver plate at home for cheap enough but I haven't tried it)