DD has been prescribed colief and it says on the leaflet and website to add the drops and wait half hr. I understand it needs time to break down the lactose in the milk but does it really need the full half hr? In the day I can roughly work out when she wants feeding and start to prepare it an hr before but more often then not she ends up screaming for a bottle obviously this always happens through night as I can't predict when she will wake up. It advises against making bottles up too far in advance on the formula carton but I know other people do it, or should I just put up with having to make her wait? Sorry for the rambling post