Only used it on one radio so far, a 1980's transistor type radio with scratchy volume knob and band selector switch.

I used it to clean up a scratchy volume knob on a vintage clock radio that I have and it did the trick

I was working on some older stereo equipment and found the volume and tone controls were very "noisy" which resulted in some fairly loud scratching sounds being introduced.

I had a noisy volume knob on my Digi 003, This fixed it with just a couple of sprays

If you have a scratchy volume control get this stuff.