I think the stuff you're talking about is what I was talking about after the solvent spray. It's not just pure solvent, it has small amounts of silicon protectorate in it, the solvent and air pressure blow/flush debris away and the silicon left over shields. What you have is great for cleaning, I'd go with a second spray for protecting afterward as I said. The all in one sprays sacrifice in one aspect or the other.The silicon protectorate on a dirty surface could bond dirt particles into a mud, the silicon acting as a polymerization agent, or nucleation site for flocculation of a contaminate to the surface after the fact.
If you want to get into some of the nitty gritty (seriously) details about cleaning of metal surfaces for electrical contact, or even for general corrosion resistance I can definitely help. I worked at plating shop for 10 years. What they consider 'clean' would make you blanche, truly activated clean raw steel will rust/passivize in less than a second in ambient forced air. Copper at a handcount.
I'll have to leave my opinions open about the 'older stuff' if you can't provide a specific product or formulation. No one likes to think it but what we think of as a clear surface is more than just a bit highly subjective.