I have a Kenwood KT815 tuner - pretty decent 5 gang tuner... At the
bottom end of the tuning dial it is very difficult to tune -
inconsistant tuning, does not smoothly transition through the tuning
range, but rather jumps around, then does not necessarily stay tuned
in to that frequency well. These problems do not occur at the top end
of the dial.

I have cleaned the tuning capacitor on 3 different occassions using
various methods, including compressed air, circuit board cleaner, and
a combination of both. Every time I clean it, it works great for
awhile, then goes back to acting badly again.

Any thoughts about this? I suspect there have been previous posts on
the issue, but I didn't find anything...

Thx
Scott Kelley