Why informal arrangements always fail
The usual pattern is that one tenant, more bothered by the condition than the others, arranges cleaning for a shared area and pays for it. That works until they leave, or until they conclude they are subsidising neighbours, at which point it stops and the area declines rapidly. Nobody then wants to be the one who starts paying again.
The structural problem is that the payer has no authority and the beneficiaries have no obligation. A written arrangement with a single payer, funded through outgoings or by a formal cost-sharing agreement, removes that instability. It is a commercial conversation rather than a cleaning one, but it determines whether any cleaning arrangement survives. Recording the arrangement in writing, including how it survives a tenancy change, is what distinguishes it from the informal version it replaces.
