We began Advantage treatment (Google Advantage and Fleas), took them out of the house to a local park (used carriers), but before we left we prepped the house and bombed it with pesticide. Follow the directions thoroughly. We stayed out of the house for the recommended time and came back later. We continued the Advantage treatment and the fleas were permanently eliminated. Also, the cats were strictly indoor after that because they can pick up too many pests and diseases outside.
We began Advantage treatment (Google Advantage and Fleas), took them out of the house to a local park (used carriers), but before we left we prepped the house and bombed it with pesticide.
We left while the place was treated and the fleas infested the car. One hot summmer day I started it and left it running for about an hour with the heater up full blast. No more fleas in the car...
My take on Advantage is that treat the cat and within a period of time the fleas will all die, the treated cat serves as a attractor/collector, and poisoner of them.
People sometimes forget that there is a birthing cycle for fleas to contend with that can cause a short lived reappearance of them.