How much water must I mix with 1 scoop of formula milk? The tin says 1 scoop to 30 ml formula but my confinement lady says 1 scoop to 10 ml.

please follow the exact instructions on the package, as different brands have different requirements. also, diluting or adding too much can have an adverse effect. if you dilute it too much your baby will remain hungry. if you add too much, it can put a lot of pressure on your baby's digestive system.