For 5 rooms, kitchen, bathroom and hallway I bought 8 Fogger, ie one for each room. For three days, no more flea was then to discover. On the fourth day came the first again. And now I awake every morning with several bites. The cat, the fleas were then, has taken my daughter when she moved into his own apartment, and otherwise there are no animals. It annoys me immensely that I have almost 90 spent on nothing.