There are different approaches for the awareness raising and the behaviourial changes. Some very good proven approaches are -
- Many more .. .. ..
Which ever the approach you decide, you always have to contextualize. You know the context of your targeted areas. Get knowledge on different approaches and then you will decide which approach will be the best fit for your context.
Wash'Em is mainly a tools to assess the situation and monitor the achievements that will help you to design your future interventions. Wash'Em is not an approach to behaviour change.
All the best.