Had this problem last Spring. I have indoor cats & either they picked up fleas at the vets office or they hitched a ride on us. We used revolution on the cats, the vet said to put a few moth balls in the vacumn cleaner bag, & we used Raid Flea Killer Plus on the carpet. It last up to four months. It is more like a fogger that you spray. Since fleas do not lay eggs on the pets you have to treat the carpet & floors. I had to do half the house one day & the other half the next day. We had to keep the cats off carpet until it dried. I swear by the Raid. We never had to wash everything in the house & no more fleas after a couple of days. Good luck.