Familiarity with a tune often breeds the inability to hear it anymore. Everyone knows the sensation of a melody that just keep going round and round in the brain, forever looping, driving us mad.

Next time that happens take charge: Linger over each tone in turn, only moving on when holding it becomes virtually impossible.

The sensation is rather like filling a water glass drop by drop until the surface tension actually raises the water level above the rim of the glass before it overflows.