Where flea infestation is light, you can get rid of them by giving your cat a lukewarm bath. Soap and water can control fleas without much fuss, especially when used together with a good flea comb.
Bathing as a control method should be coupled with cleaning the home thoroughly and any other aforementioned method of repelling fleas. Otherwise, fleas hiding in furniture and carpets will move back onto the cat right after the bath.