Radio cleaning and pre-emptive cap. repair?

Somewhat related is if your volume control isn’t as variable anymore? I might take the cover off mine to poke around but the minimum volume on it is quite loud on mine. Im assuming it must be something with the volume rheostat/potentiometer that isn’t working well anymore?
That seems likely but not my area of knowledge. Maybe vacuum and a little DeOxit 5 worked around in.

This radio was working pretty well. I just happened to have it out because it made it easier to get to other stuff. When I saw how dirty it was inside, I opened it up to clean. If I hadn't taken the top off I'd never known there was a crack on that stacked cap. That's not to say it was working perfect - but it certainly recieved the stations audibly.