I'm not trying to be a wise acre but what do you think dielectric grease is?
Silly cone maybe?
Now that was a smart answer, phony boobies were silly cones.
I found some wire brushes for my Dremel tool and at least once a year clean the sockets holes with the little brushes. I use a different brush to clean the male parts.
Changing the entire socket and plugs are easy but a little cleaning and silly cone grease goes a long way. Oh sorry, I just have a six pin hook up, seven pins or blades takes two minutes more.