cactus jack wrote on Apr 29^th, 2012 at 4:52pm:

What they dont tell you is that you can smell it from 25 metres away as well, and boy oh boy do they stink. If you cant smell it , it aint working.

What they also dont tell you is that the homemade ones will catch thousands.....I did actually work out how many (approx 8  flies to cm3 in a 5 litre bottle etc etc....but all they do is atract even more flies in,you wont see any difference at all outside.They even lay their eggs on the dead flies and the maggots then eat their parents and so the cycle begins....