Actually, not so much when it doesn't get used as it often doesn't when used with a PC etc. Fix is usually just to exercise it a bit. Pots like this are self cleaning but need to be used every so often for that to happen. Popping is a different issue. I do know that there was period where a LOT of manufacturers were shipped misrepresented/bogus electrolytic capacitors from a chinese supplier. Only shows up after some years and not because the manufacturer cut corners.