The bleech sprayed on floor joists works fine BUT the fumes can be really dangerous! I used a one part bleech/2 parts water solution in a garden sprayer and wore a high filter mask, rubber gloves, and covered up well. I was coughing for days afterward. So I would advise doing sections at a time and allow time for fumes to clear. But yes, the house smells alot better and it has now been a year. After you get it cleaned up, consider adding vents (or more vents) and insullating the floors- it's so much more comfortable!