I had mentioned that 1260 applied to one speaker cable did not do anything.
Now Rick told me two things. 1. Some contacts are too polished to hold 1260 well.
2. Speaker spades and bananas need to be completely covered. I did notice that my spade when “painted” with 1260 had lots of clear spots. And that I only applied it to the tips of the spade. So, that explains why I heard no improvement.