We are doing a mix of bf, expressing and formula feeding. My DD struggles with bf at night so we've been using pre mixed formula which we can just pour into a bottle. I'd like to move to the powder but I'm not sure if I can pre-prepare the water before I go to bed? I read somewhere that this isn't safe. Is that true? How do you cope with formula feeding if you don't prepare in advance? Do you just have to try and calm a baby who is screaming for a feed? Thanks in advance - dumb question I know but I'm just not sure! 