I got this really cool bug kill thing (from Japan). Inside of the usual water/gas thing shooting at the bug, this actually shoot a foam. The foam is sticky. I actually hit the fly's leg and the fly trying to escape! so i spary more over him. The foam will wrap around the bug and cut out all the air. And when the foam dried up a little, you peel it off like a silly puddy. So clean! (you can see the bug trapped inside)
