I've conditioned and nit-combed all our hair and dd, me and dh have all had nit shampoo in overnight so hopefully we are now nit free. It said unsuitable for under 6yrs without medical supervision on the bottle though and ds has very sensitive skin so I didn't put any on him. I'm just watching him scratch his head (I haven't found any nits on him yet...) so what I can I do for him now?