The ratio is approximately five drops of essential oil in two teaspoonfuls of carrier oil.
Then grease two baking trays and drop heaped teaspoonfuls onto them, leaving a little space for expansion.
Take half a cupful of hot water and dissolve ten teaspoonfuls of salt in it.
Drop teaspoonfuls on oiled sheet, about 1 inch apart.
Try giving your baby three or four small teaspoonfuls of food only part way through or after their bottle feed.