Several years ago I moved into an older home that was infested with fleas (which I discovered AFTER moving in). Being the organic type I did not want to use foggers or any type of pesticide. I bought one flea trap to see if it worked. After one day of use I was so impressed with it, I ordered 4 more. Within five days the infestation was GONE. Yes, you have to put up with the nasty things for a bit longer than if you fogged or sprayed. That is a small price to pay for year-round flea control with NO pesticides!