Jurgen Klopp knows it isn't easy to solve, because he also knows that it wasn't easy to crack in the first place.
Liverpool's success, and more importantly their often relentless consistency, under their German manager is under threat, but it is under threat more from themselves than from anyone else.
Klopp knows that, and after his lament over his side's defending in Saturday's 3-3 draw with Brighton included references to the chaotic early days in charge back in the 2015-16 season, he'll be determined to see them tighten up for Tuesday's visit of Rangers.
