How to remove rusty stain on remote control ? I search on google and youtube telling using vinegar and a cotton ear bud.But the rust is a lot like whole spring are brown.Some are in green colour.
How to actually fix it ? Happen because the battery wax leaking out.

If can't clean , where to buy the exact remote control battery contact spring around ?

Can't buy a remote since it is special build with the player it self.

It also happens on alarm clock . Maybe tesco battery brand not good ?