 A major part of the problem that we have in the sanitation sector is to change hygiene behaviours. We are eager to know exactly why people do the things that they do and why don't they do the things that we want them to do. And that is mostly the policy challenges we face. So why do people practice upward defecation? Why do they not do hand washing? And why do they not use toilet facilities, major challenges we face? And these inadequacies cause disease, disability and death amongst children under 5 and affects development to a larger extent. So part of the problem is that some of these approaches to change behaviour have been top-down and with little reflection on preferences and needs of the targets. So we have different types of tools that have been used including subsidies, including information, including penalties and now nudging which is also being promoted. But then there is little emphasis on how targets actually perceive these approaches and to what extent these approaches are efficient in changing behaviours. So we need to know exactly what type of targets we are addressing. Those targets that have the information, those targets that are willing to change, those targets that have the resources to change and those targets that have the resources have the knowledge and don't want to change. So this is important as we work towards the SDGs because we need to be able to include everyone in all the approaches that we do and the approaches also have to be contextual for it to be sustainable.