Most fly sprays are meant to kill the insects. But did you know pyrethrin and permethrins breakdown within an hour or once exposed to UV light rendering them ineffective?
This is why manufacturers add sunscreens and chemical binders, all meant to protect the pesticide and help it last longer. In addition, scents and attractants are added to these fly sprays to attract bugs to the pesticides and to mask the unpleasant smell of the chemical ingredients. Most of these ingredients are unsafe for you and you pets! Know what you are using. If it's not safe for people, it's not safe for your pet and the environment.