I would suspect that several hours is not enough to change anything but several days or perhaps weeks will do it. I remember that when reviewer disconnected battery from Audioquest IC he could not hear any difference but connecting it back after long time was audible (cleaner "darker" background, better clarity etc.)
Cable re-burn in
How long does it take for an already burnt in cable to re-burn in back to optimal? I'm doing a lot of interconnect and speaker cable comparisons and sometimes a cable will sit unused for several hours to several days. Is it a fair comparison to A/B one cable against another when cable "B" has sat for unused foe 3 days?