"After a delay in realizing my cats had fleas, I began the process of trying to eliminate them from my home - a 1000 sq.ft. cottage with several small rooms. Trying the easier methods gave no joy at all. Nothing seemed to make a dent in the flea population. So I figured it was time to bring out the big guns. My vet recommended either Bio-Spot or Adams, and seemed to prefer Bio-Spot.
I ordered a couple of 3-packs, and I'm glad I did. Even though one can is good for 6000 cubic feet, because of all my interconnecting rooms I used two upstairs and two downstairs. After several hours I came back, ventilated the house, and have not found any living insects anywhere in the house despite careful inspection in all rooms. Actually I was somewhat surprised at the number of DEAD bugs I found!
This is good stuff if you use enough to reach ALL locations. Maybe there's no such thing as "too much"?"