How long does it take to kill the fleas?

Mother earth dust is not recommended for indoor areas that are inhabited. Instead, we recommend Conquer and Precor IGR to spray onto carpets and outside perimeters. To rid of fleas, it is important to vacuum daily. If you would like an immediate knockdown item, Demize has a 15 minute knock down. Afterwards, you would want to follow up with treatment using Conquer and Precor IGR. Flea infestations can be difficult and take various lengths of time depending on the size of the infestation.