Protect yourself from pesky flying insects around your home with Hot Shot Flying Insect Killer 3, 18 ounces. The aerosol spray kills houseflies, mosquitoes, gnats, fruit flies and other listed insects both indoors and outdoors. The water-based formula kills by contact and also kills for up to 4 weeks against mosquitoes and houseflies on non-porous surfaces. Hot Shot Flying Insect Killer3 leaves behind a clean, fresh scent.