I have a Sangean ATS 818 (AKA Realistic DX-390) shortwave radio that I
love and have brought all over the world with me. Recently, I did a
stupid thing and left some really old batteries in it and they leaked
inside of it. I removed them and it's been working fine, but within the
last two weeks, whenever I turn it on, it plays static on every channel.

Maybe once every week or so it'll actually turn on properly, but I am
thinking that this poor radio's seen it's better day or that I might be
able to open it up and hopefully clean it up and restore it to a normal
state. Does anyone have any suggestions on a recommended way to clean
the remaining residue of the battery leak? Is it even worth trying to
clean or is it too late for this radio?

Cheers,

Mark