Nora,
I am so happy to hear that you are taking the bull by the horns -- ripping up the carpet and laying the tile by yourself --Wow! I love that everybody here is rooting for you and posting such positive things.
Instead of using harsh chemicals to clean, you can clean just with Vinegar, Baking Soda, and water. Otherwise there are products like "Seventh Generation" or "Planet" that are unscented.
And don't get discouraged if it takes a bit of time to see results. Just stay with the program and you will see improvements.
One more thing: I know that a major source of exacerbations are colds. I can't recommend anything for a child, but I will tell you what I do to prevent colds (it really works for me) -- maybe you can find out if there are kid versions and check with your doctor to see if it's okay.
At the first sign of a cold (scratchy throat)
Nasal Rinse every 4 hours or so --Kids can do this
Airborne (I think it's for ages 12 plus) or generic brand
Zinc lozenges 15 - 20 mgs every 3 or 4 hours--I believe there's a kid version
Zycam -- there is a kid version (zinc for the nose) Kid version uses gentle Qtips
Freshly grated ginger tea to thin mucus and stop cough.
Symptoms ususally go away in a day, but if not, you feel symptoms slightly without the stuffy nose.
Continue a couple of days after symptoms are gone.
Feel free to ask any questions.