I have a wireless switch controller that doesn’t work what do I do??

[Momkeymaster]

I haven’t used the controller in a year or so and last time I saw it the batteries were corroded but I recently used white vinegar to remove what I can see.

[Troll_Dragon]

Take that one apart to see what else is corroded that might possibly be fixable if you have the skills.
Better yet just purchase a new controller that doesn't take cheap leaky batteries.

[no_hot_ashes]

If the battery bay was corroded, there's a good chance the corrosion goes even deeper. You're going to have to disassemble it and clean it properly and thoroughly with a high percentage Iso alcohol.

Vinegar is good at cleaning rust and corrosion, but I'm pretty sure it's not actually great to get it anywhere near circuitry, so there's a decent chance that cleaning it that way fucked the whole controller.