Well, I got it working! Someone suggested a fiberglass pen from Rat Shack and with a bit of elbow grease I cleaned it up to get it to work. I'm going to try it on the battery compartment of my Folks old Konica Autoreflex T (It's a bit special to me because it was our "good camera" when I was growing up...my Dad put a funky strap on it which I recognized immediately when I saw it )