I've had the best luck with a combination product that is a spray not a bomb so I can be sure it hits where I want it to hit.
http://reviews.petco.com/3554/3057/reviews.htm
Any animals on the premises (dogs or cats) could be treated with Frontline also to get rid of the population on the animals.
If you think the fleas may be coming in from the yard area a treatment with Nylar on the ground surface may help.
http://www.pestproducts.com/fleasoutside.htm
Hope this helps you!
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