Leaky batteries

[Fungus]

What's the best way to clean up the springs in a battery compartment if a battery has leaked a bit and corroded them?

[SeanB]

NiCd or NimH cells use vinegar. Other alkaline cells as well, followed by a rinse with a paste of baking soda and a final few water washes while scrubbing with a nylon brush. Finally with bare metal use a light coat of grease, baseline or siliconer grease, to keep the bare metal from corroding further.

[Daniel_Reyes]

Pee on it.

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[tautech]

If you can dismantle it, hot water will dissolve most of the salts deposited as a result of the corrosion and for just the contacts, boiling water. Then as Sean describes Baking Soda is a good neautraliser.
Sometimes I will tin contacts with solder to help prevent further oxidisation, but if the contact tension is weak it pays to rework the contacts for trouble free operation.

[Fungus]

Will try the suggestions, thanks.

(Taking it apart first definitely seems to be the way to go.)