If one parent has handled all the bedtimes and wakings until now, the other parent may have better luck breaking the old associations. When a child cries and one of the parents responds, it is probably best if that parent continues to be the one who responds until the child falls asleep, so that the child won’t sense that he can control who comes in by crying enough. For similar reasons, it is good advice not to let your child insist “I want Mommy” or “I want Daddy.” Decide who will handle each night’s bedtime routines, and stick to it.