wished I had seen this post earlier, with two infestations under my belt, I'm a bit of an expert now
Yeah everyone has given you excellent advice
here's some of my tip's, short and straight to the point
above all, the fleas live in dark warm areas, bedding, skirting boards, under furniture etc
You treat Kitty with Frontline and don't wash em
the next thing to get treated is the house, spray in all areas concentrating on the dark warm areas mentioned above
then leave for a few hours then get the hoover going.......... also wash kitty's bedding and if kitty sleeps on your bed, wash the blankets too,
after that you should flea free and happy again
worst one I had was after I had a shower, I had to take about 20 steps to get a towel, I was attacked in the process
in the seconds it had taken me to walk that distance, I ended up picking 26 fleas off my legs
glad to say since then I have never had a recurrence " touch wood "
hth