I am passing ours on to a friend, and I realised I have no idea how it works. It's the Avent Express one, white with a blue inside and a dial that goes 1 to 3. There is a sticker on the front which gives times for different sizes of bottle, but I can't remember anything else as I only used it a few times. I assume you put water in but how much and is there anything else she needs to know?
Any help gratefully received, thanks