Hi Guys
Pemethryn is the only product I have found which kills fleas effectively.
There are two problems, firstly the fleas which need to be killed and secondly the eggs which will hatch at a later date leading to a reinfestation.
The Pemethryn is a powder which remains in the carpet , best to advise the custy not to vac for a few days, so the Pemethryn is still present to kill the new fleas thus breaking the cycle of reproduction.
Cheers
Doug