SX-25 wrote:
I know this topic has been covered exhaustively on this forum but I
think I may have dozed off.
I am interested in opinions about cleaning rotary wafer switches? For
years my preferred method
has been to use a plain old pencil eraser which has always worked well.

This can work, but it can also remove plating, which is very bad.

However my current
project is a tube tester with a dozen multi-section wafer switches and
there is most likely no way
I can get into the middle sections with any sort of tool without
probably doing damage. CAIG Deoxit
D5 is my cleaner of late however I am interested in any suggestions you
may have for other cleaners
that are safe for wafer metals as well as the phenolic material they
are crimped on.

DeOxit is a good choice. However, if the plating on the switches is damaged,
no amount of cleaning will help them.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."