Re: Maybe if they collected less insects, there would be more around...
Eeeh, lad, I can remember the day when a fly killer spray did what it said on the tin. The crap you get sold now only works by drowning them
Mostly true, although you can still find the "good" stuff if you look properly. I have a can of that (used it twice I think; I am usually quite happy sharing the premise with unobstructive bugs). It works very well, although the instructions for inside use state that you should spray it quickly, exit the room immediately, close it thight and return only at least 1/2 an hour later and then open all windows etc.