Marakanetz...Of course you are correct that there is no need in the home audio situation for the extra connection involved with using termination devices, spades, bananas, or whatever. Minimal bare wire, solder tined to avoid strands unraveling, is next best to soldering the wires to the drivers (which is what we did in the good old days). Termination devices are appropriate for audio shops and pro sound use, where frequent connection/disconnection is necessary.
In that context, how do we feel about Speakon connectors which have taken prosound by storm? I have amps with these connectors but no matching cables as yet. I gather that they have a twist-to-lock feature that provides a wiping action to give good contact. They have four-contact models that would work nicely for a neat biwire setup. (I go bare wire at the amp end also).
Surely you jest about cleaning the wires twice a month using Pepsi! Reminds me of the old TV program, "Candid Camera" where they convinced women at an auto repair shop that the air in their tires should be changed regularly like oil in the engine. If you do think this periodic service is necessary, I suggest that Vodka would work better than Pepsi, especially if you listen to a lot of Tchaikovsky. I find that Pepsi imparts a sickly sweet midrange quality :)