hi there i have exoerience of communal area cleaning.
there are two extremes, firstly all privately owned, and therefore communals are looked after very well, gardens, bin ares, and car parks along with internals all tidy.
social housing,and city communal areas, cometimes not maintained to the same standard, i had one where you would clean all the communal are and even before we had left the building, it had been abused again.
in the end we had to show the housing officer, exactly what we did, and then they witnessed for themselves the fact that it was dirtied before we left site.
you only get paid to clean once, and the housing assoc, then understood the issues.
regards
martin