I am going to measure the conductivity of a glass using multimeter. It has alligator clips which mars the surface of the glass. Even using those needle like of stuff does not work because of minimum contact i get. Is there is substitute that can replace
A: Put a couple of pennies on the glass and clamp them with the alligator clips. Good conductivity, no surface marring.
By the way, do not expect anything but infinite resistance for standard glass. If it is only normal glass, it is not