Clearer sound after reconnecting cables?

Well, sure.

Tiny amounts of crud and corrosion on the connector surfaces change the resistance and capacitance characteristics of the connection. I'm told that in extreme cases this stuff can even act as a diode.

For years, experienced listeners have been recommending that you unplug and plug back your cables every so often, just to clean them off.

It sounds like you have some dirty connections. Even when my system sounds good cleaning the connections makes an improvement. Cleaning connections includes interconnects, speaker cables and power cords.

Thanks.
Is there a recommended way for cleaning them connectors?
Thanks.