You need an "electric tennis racket" that is a fly swatter with a rechargeable battery that you turn on, then when you swing at the fly, it electrifies the two grids, and the insect get zapped when it touches. I had a mosquito who ran up on me right on my chest when I was in bed and I spanked (and zapped) him right in front of my face. To test it, I just do a tiny spit into the grid with the trigger button pressed. sparks and zaps men it's live. Best flyswatter idea I have ever had. Sometimes, I've been outdoors on my balcony, and I just swing it through a whole cloud of hovering, greedy mosquitoes and watch them zap and fall. Never seen anything as effective. Hunter becomes the hunted, just like in the White House.
HA - the government banned those here in AUSTRALIA - we have one - GREAT fun - and no chemicals involved - environmental fly KILLING - HA. CHEERS from AUSTRALIA.