How do you kill fleas in carpet?
See if you can hire a professional steam cleaner - the
superheated steam sterilize the carpet and therefore will kill the
fleas, if the carpet is properly steamed all over. Note, if you
have fleas in the carpet then there have been or are pets in the
house, you need to wash the pet bedding regularly and make sure
that you vacuum through the house at least twice a week
(concentrating on where the pets are).