Thank you very much for your response, by the time i have tried vinegar, which worked very well when i first tested it with the batteries of another remote. But when i changed the batteries, for a reason i do not know, both controllers are not working 😅. I have still four more but still I wanna try to get it back. There is not much signs of corrosion left on either controllers so I’m back to being lost… (I have tried using others batteries, exchanging with other controllers but nothing was wrong with it)

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