Just a suggestion. I got one of those Cool Mist humidifiers, I run it in DS room every night. It has a nice soothing hum, is safe for future too, because it's cold air and furthermore, is nice for any dryness in the air. It was so nice we got one for Mommie and Daddy too. Now we all sleep better at night. For us it helps to drown out the sleep noises he makes on the monitor, and I only hear the distress cries, (rare), and for my son, I use it for night sleep only. I figure he should be able to hear SOME activity sounds around the house, and know that that is what it is usually like and sleep through it in daytime, muffled sounds from the nursery might even be a bit reassuring. I do use it for nap time on trash days though, (very noisy dogs barking, big trucks, bins clashing). I did have the sound monitor, very useful in early days, I use it for a cue, while he has his goodnight bottle, but turn it of before I put him in his crib, reason being it EATS batteries, and we're kind of recycling/reusing nuts. This humidifier helps dramatically, during my "Hell Week" of weaning from night feeds, a friend suggested the humidifier. That night he slept 8 hours straight, next night 11 hours straight. He still wakes occasionally early mornings, but my goodness it worked for us. He has lovely sound sleeps. I don't know, it's probably a combination of many things, and their sleep is so fragile, one small thing can knock it all out of whack, but it never hurts to try right? And dare I say it? *knocking on wood, crossing fingers, eyes, toes*, does not suffer from any colds, coughs, congestions, ear infections, nothing. Like I said just a suggestion.