Nonsense. Using a proper technique for cleaning the volume pot, it will
work well for years. One simply has to understand how they are built, and
apply cleaner where it counts. There's other considerations - blowing out
with compressed air before and after the cleaner is applied, for example.

Fine If this worked for you, but consider then following:

The pot's resistance path is made from carbon (the worst type) or cermet.
(and I don't assume that this receiver is equipped with plastig pots by
Penny & Giles)

Carbon tends to get cracks and/or even breaks sometimes and there is a
considerable amount of wear on both carbon and cermet pots. There is no way
of fixing this with contact spray, compressed air,....