> > I bought replacement switch pads for the TS612 from Comrex
> a
> > couple of years ago, for $60 apiece.
> >
> > If they don't stock them anymore,I believe Mike Sandman in
>
> > Chicago
www.sandman.com has a couple of cleaning solutions
>
> > that are supposed to rejuvenate the conductive surfaces on
>
> > membrane switches. Have not tried this myself.
> >
>
> Thanks, again, for the info. Had another TS 612 blow up (I
> never ordered these to begin with) yesterday. Comrex was
> very accommodating but essentially said I was out of luck
> because the product is no longer supported and parts no
> longer available.
>
You might be able to get a little extra life out of those membrane switches by using a pencil eraser on the contacts and rubbing away some of the carbon buildup.