An excellent expositon of some of the inhibitors to successful sanitaion improvement interventions. An additional issue to examine is the involvement of the urban settler, especially the poor in planning and management of sanitation improvements. People should be educated to know that their sanitation behaviour/practices have multiplier effects and allowed the space to participate in determining solutions to sanitation problems and managing the sustained success of such solutions. For example, it is not enough to tell people that blocked drains cause flooding, but how the flooding can cause their toilets to overflow and such overflow cause a mirage of diseases. They should then be given a chance to contribute to deciding how the blocking of drains could be stopped.