TW>->      Another old trick is to clean especially edge connectors is a Dollar
TW>-> Bill, or any other US Currency.  Works great!  Funny you should mention
TW>-> Defender.  I have a complete board set at my parents house.  Been there
TW>since
TW>-> the 80's...  Haven't worked on one of them since then too!

TW> A good old fashoned Pencil eraser I have found does a much better job.
TW>In fact in my day of repairing Critical Medical Equipment several
TW>manfacturers recommended Pencil Eraser cleaning of card edge
TW>connectors.

 Many of us in GEMS used to finish the cleanup with a light coating
of TV tuner contact cleaner to leave a small deposit of oil in the
small pores of the metal contacts to delay corrosion resulting from
the salt air here on the right coast.

Ciao, Ack.
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 þ SLMR 2.1a þ Engineers have the formula for doing IT.