Ok, heres the thing...
You cannot treat the inside of the house, and not treat the yard. If there are fleas in the yard, everytime your dog or cat goes out, theyll bring in 100 more fleas.
The house needs to be fogged. Not with a cheapo brand, a good fogger. You need to use a carpet spray, yes, even if you fog, and get under furniture, cabinents, behind couches etc. Anything you can wash, wash in hot water. Blankets, pillows, curtains etc.
Your animals need to be treated with something that will kill the fleas AND will kill flea eggs too. Frontline Plus, certain flea sprays, certain flea dips. Again, dont cheap out. You get what you pay for.
Throw the flea collars out, they dont work and arent worth a dime.
Flea eggs can hatch up to 90, yes, 90 days after they are laid. One flea can lay one 200 eggs in its lifespan. Do the math.
you need to continue treatment for weeks, and months after you think you have it under control. Otherwise, theyll just come back. They are hardy little boogers and if you treat, but dont kill them all, you will end up with a "super bug" that cannot be killed because they are resistent to the pesticides you are using.
Good luck. Posted via Mobile Device