Free Idea # 214 - Fly spray with a dual aeroso

Create a fly spray with a dual aerosol. The first aerosol would
be sprayed on cloth or paper to impregnate it with a scent
irresistible to flies (yet palatable to humans). Once the flies
have gathered to investigate or feed, they can be sprayed with
the second aerosol saving the user the chore of spraying the
whole room.