Clean Green Corrosion/leakage From Batteries

[Dumbelle5]

I have an old Walkman and in the battery compartment on the contact there is green corrosion ?? If that is the correct term. How do I remove it. Would acetone help. I don't want to damage the contact. Thanks in advance for any advice.

[tonyav]

It'll be copper oxide, a few methods of removing it on this link.
https://www.doityourself.com/stry/how-to-clean-off-copper-buildup

[melv16]

Gently rub the connections with some fine steel wool. Be careful not to get any in the works.

[TonyV]

I had similar problem with some Christmas decorations, sorted it by carefully scraping terminal with my penknife.

[Dumbelle5]

Thanks for taking the time to reply. Have not yet attempted the cleaning. When I do will use something from all the replies. "A bit of this and a bit of that".