I first used the mold bombs in my temporary housing. After results was an improved air quality. I used 6 in my 2 br condo that had been flooded from above, sustained years of inner wall leakage, and flooded basement area below. I am able to work with a mold mask for several hours. The biocide liquid was used on floors, counter tops, dish washer, and the kitchen cabinets inside and out. Combined with ventilation, the interior wall cavity in the hallway I am in the process of spraying. We are able to remove the items that hold mold spores and just want to say a really big thank you for this product.