[TenTec] Dirty Band Switch??

[timcook@erinet.com (NZ8J)]

Hi,
I picked up a nice little 509 Argonaut station, but it has been sitting for
a long time and the switches are intermittent (mainly the bandswitch) Seems
like I saw in a Ten Tec manual in years past about not using contact cleaner
on the wafers because they were lubricated and using the cleaner would
damage the wafers.  In light of this, what is the accepted way to clean
these wafers and get the contacts working properly?  Thanks for any info..
73's
Tim
NZ8J