It will take a little time to work, so don't apply more on her, she could get very sick. Like Karen says, make sure there are no fleas in any carpets or bedding kitty has contact with. Wash any blankets she has been laying on on a high temperature, and vacuum the house every second day, especially around the edges. Fleas like to hide in dark places. As the eggs hatch, you will get more fleas, so make sure to continue vacuuming, and empty the bag outside into a plastic bag that is tied. Any clothes of yours she has been in contact with, you can put in the freezer for at least 24 hours, or wash on a high temperature.

It is hard work to get rid of them, it can take up to 6 months, or more, but don't give up! Good luck!

When I had a cat, I used a few drops of Advantage every few months and he never had any fleas.