Will Falconer, DVM Moderator
In preparing this post, I came across someone saying something to the order of "cleaning your house like a crazy person won't prevent fleas." And I totally buy that, and hear stories like yours fairly regularly.
It's not a cleanliness issue. It's a flea reproduction issue. If my clients are using the Non-toxic Flea Control principles and still seeing fleas, it means somewhere in the home, flea eggs are developing into adults. When an IGR is used on every surface flea eggs could fall on (they roll off the coat of your dog), they shouldn't develop to adults. Period.
So, think where your dog lies or hangs out. Is that surface treated to prevent flea eggs from hatching or larvae from moulting? If not, get the IGR on there. And don't wash it away! Or if you have to wash, then reapply it. It lasts 7 months with one application.
The other thing, especially when there is more than one dog in the family but one is always the "flea magnet," it's time to seek a veterinary homeopath. There's chronic disease lurking in that individual that diet and poison avoidance hasn't been enough to cure. Probably vaccinations in the background.
Check my Resources page for the AVH list, and hire someone who does mostly or only homeopathy. Where they are located matters not. Work by telephone if you don't have a vet homeopath in your area. Odds are you won't, sadly.