First off, NEVER use products like this. Any amount of bombing is over bombing. This is where things like cancer come from. Always take the natural approach. Even in bad cases like fleas, a solution is not a solution that gives people headaches and stomach aches after just an hour of exposure. You need to get your entire family on a body cleanse. There are herbal versions, but I'd go with something a little more intensive. There are clinics that do this sort of thing. Look into it.
It's not just the air and the carpets. It's also the furniture, the book shelves...every surface in there.
One way to possibly fix it is to turn on the heat, and turn it up as high as it will go. Leave all of the windows and doors closed. Leave it running for 24 hours. Then come back and open everything up, run the fans, etc. The heat will have broken down the chemicals. This USUALLY works.
I'd buy some chemical suits from Lowe's or the Home Depot - the hardcore kind - and use them any time I have to step foot in that house. And after the heat treatment, I'd have my husband help me wipe down all surfaces, just in case it didn't break everything down. And I'd treat the rags like nuclear waste - throwing them out after.
Good luck.
L.
PS if you want your son to remain a cancer survivor, get rid of all of your RAID, bleach, everything. Don't allow any such chemicals in your house (...garage...etc.) Also, read The China Study to learn about how animal protein provides the breeding grounds for cancer.