You could go and get one of the new filters out there that clean the air. I had one demonstrated for me from Filter Queen. They say they get out most of the bacteria in the air out and also dust mites. Try getting a new bed and vacume it that can help. Also change your sheets regulary and pillows cases, get new pillows every 3 months. I alos use a product called skin-e-dip on my kids and it works very well. It's all natural ingredents. It's on the web at skin-e-care.com