I live in a block of 5 flats. They communal areas are cleaned once a week, but within a few hours of the cleaners leaving the place looks a mess again. People let their kids drop sweet wrappers and crisps on the floor, or walk through the area in mucky workboots, or carry bin bags down to the communal bins that are leaking. Not to mention leaving bikes and buggys directly under the sign saying personal items cannot be left in the communal area.
What is wrong with people that they cannot make even a minimal effort to keep a shared space reasonably clean.