[Mom2TwoYorkies]

Do you have carpeting? Fleas multiply like rabbits . . .Fleas have four main stages in their life cycle: egg, larva, pupa, and adult. The total flea life cycle can range from a couple weeks to several months, depending on environmental conditions.

Flea eggs fall off of the animal into the carpet, bedding, floorboards, and soil. When the flea egg hatches varies -- anywhere from two days to a few weeks, depending on environmental conditions. The larva emerges from the egg using a chitin tooth, a hard spine on the top of the head that disappears as the flea matures.

So, if you have carpeting, it probably is why you keep finding fleas. Also, I don't know much about resolution, but Frontline Plus works well for mine.

Good luck, we only had fleas once when we lived in our condo back in 1987 and they came from the previous owner. I had an exterminator come out and then we actually removed all the carpeting and replaced it.