Dave Platt wrote:

I have a vague recollection that one type of "tuner cleaner" actually
included a small amount of a lightly-abrasive material, intended to
clean oxidation and cigarette tar and etc. off of the contacts in
old-style black-and-white television tuners. Some "tuner cleaner"
products also include a lightweight oil to act as a residual
lubricant. Then, there are the (preferred, IMHO) "zero-residue"
contact cleaners.

Dave Platt

There was a foam pad with a gelled cleaner you put in the cover of
drum type TV tuners to wipe the contacts as they passed under the pad.
The were good on old, almost worn out tuners. The pad would last about
two years before it crumbled, and you had to service the tuner again.
--


Michael A. Terrell
Central Florida