Spoke with Larry this morning and his opinion is their metallurgy/quality has changed especially since offshore manufacturing. He has seen the same thing in recent years and gets questions about it as well. There's no remedy other than what we're doing with periodic cleaning. Unless pitted from "electrical" wear, just paper or a dollar is all that is needed. I suspect the tungsten overlay is thinner too. His story about his 1950 Dodge with Gyromatic transmission that he uses for parts delivery to his other shops across the state in the summer is he found a NIB NOS distributor for it with original points. 30K miles later he never needed to touch them, no cleaning no adjustment either. They're critical for proper shifting of the trans due to ignition delay at transmission shift points. I could go on about technicalities I found ranging from SAE, IEEE, to NASA but in a nutshell when I saw nylon rubbing blocks dominating the replacements for my trucks, I went electronic. I could go on about electronics for example; but that would be pointless for this thread.