A.C.
We just went through this with my son, who is 21 monthes old. He was waking 2x per night and wanting milk. Finally,
I slept in the other room with a sound machine for 5 days. My husband heard his cries, but slept through them. My son got mad a few times. But now, when he wakes, he just fusses a few minutes and then goes back to sleep. Everyone is so much happier in the house with the extra sleep. It is tough to let them cry, but in the long run it is best for them to learn how to self soothe.