May be this oil kills fleas in a lab setting but not at home. We bought this oil from a very reputable company. We sprayed our entire house four times during 10 days. It ruins our carpet and cloth furniture because the coat of oil attracts dust. We need to go to more expenses this week for the professional carpet and furniture cleaning. Smell was so strong that we had a bad headache for two days after each treatment, however it did not kills fleas!!! We applied 90% pure cedar oil on the body but we still have severe fleas’ bites in 8 minutes after very generous application. We were taking pictures every day. May be it works to repel mosquitoes but not fleas and no-seems. Professional ozone generator put to run for several hours seems helps. Do not waste your money on cedar oil as a flea’s exterminator. It is does not work! Period.