You can use the same adulticides and insect growth regulators you used before, or a
sodium polyborate powder.
Borons such as boric acid and sodium
polyborate will kill flea eggs and larvae for up to a year.
With mild flea infestations, an occasional bath with a permethrin shampoo or a Program prescription may do the trick, especially when combined with a premise spray that contains a growth inhibitor or with application of sodium
polyborate, an insecticide that kills fleas by lethal constipation and desiccation.
Ingredients used in professional carpet treatments include sodium
polyborate, sodium tetraborate, or sodium borate.