Have you gotten ride of them? I am having the same problem. I have sprayed the house 4 times and they still are around bitting my daughter and I.
As far as flea prevention and treatment goes, it's always someone says. What someone says is usually wrong, though. No. Do not put baby powder on your cat. Although I'm unsure if this will cause a problem, I'm sure it can't be good. If you have nothing to put on the cat (IE - Front-line, Advantage, Revolution) then you can bathe your can in LEMON SCENTED JOY. This does kill most of the fleas on your cat.