How do you remove acid corrosion from pcb with components?

Hii...

I have found a few little gizmos that do dot work because the batteries have been leaking for several years. (AA 1.5V Alkaline, Pile Alcaline)

The challenge for me is to repair them if nothing else for the "Cool I am learning this stuff" factor.

:confused: Is there a liquid you guys use to possibly brush on a PCB board WITH components (trimmers, resistors, diodes) that will eat the corrosion but not damage the components then blow off with compressed air (possibly)?

In particular there is this one trimmer that I know i will not be able to replace because I believe it was custom made into a side thumb wheel. It is supposed to be a 5k trimmer but it is reading 5-15 MEGA-Ω due to the resistance the corrosion is causing.

Corrosion will cause increased resistance right?

Thanks!

I didn't find the right solution from the Internet.

References:-https://forum.allaboutcircuits.com/threads/how-do-you-remove-acid-corrosion-from-pcb-with-components.27896/

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