Shelter and food, in that order
Stacked cardboard behind a bin is close to ideal harbourage: dry, undisturbed and adjacent to a food source. Removing it changes the situation more than any amount of washing, because a yard without shelter is a yard that is only visited rather than occupied. That is why presentation rules outperform frequency increases on almost every site of this type.
The food source is the second control. Bins with damaged or open lids, liquid on the ground and spillage around a collection point all sustain activity. Cleaning addresses the liquid and the spillage; the lids are an equipment question for the operator or the waste contractor. Both need to be handled, and only one of them is a cleaning task. Reporting a damaged bin promptly, rather than working around it indefinitely, gives the operator a replacement request they can actually make.
