My daughter has 2 kittens aged 5 and 4 months the younger one came to her with fleas,so both kittens were frontlined,but now her house is flea infested,she went to pets at home and they told her to use a flea bomb in the house,she did this with several of them,all looked ok untill today when she now has lots of fleas in the house,any ideas how she can get rid of the fleas,she is desperate,and has 2 small children who are getting bitten by the fleas.