she should go here http://www.cff.org/
and research. ususally they have some type of CPT-- or chest physical therapy to help remove the secretions. in the hospital we call them "baby beaters".. im trying to find a picture of one but not having any luck. you can actually use a vibrator wrapped in a diaper for infants as well, tho he is too old for that. they have vests too but im pretty sure hes to YOUNG for that method lol so he probably has the baby beater.... its like a little soft cup attached to a stick and you hit them in the back and chest quite rapidly with it. it doesnt hurt, but its pretty loud.
also there should be no smoking, candles, inscents, etc around him.