Managing Kitchen Fruit Flies with a Little Shop of Horrors
The best method is to put a bit of fruit peel and some beer or wine or vinegar at the bottom of a glass (e.g. a pint glass) and then fashion a cone out of paper, where the wide end of the cone is the same size as the mouth of the glass. Cut the pointy end so it’s a few millimeters wide. Insert pointy end first, and tape the wide end of the cone to the brim of the glass, forming a seal. Flies will enter the glass via the opening in the point of the cone, and will be unable to leave. This will collect huge numbers of them with zero maintenance.