I have been persistent, dedicated to this cause, and terribly excited about what I have accomplished.
I first experimented in what substance attracted the most flies. I then selected 24 of what I thought were the healthiest and most active flies, and isolated them for their training. I waited for a few days until they became acclimated to their new environment and seemed content with their new "routine."
I implemented "deprivation" tactics that I studied, the result of Doctor Olaf Vessneson, studies of the Shapponshire cows in Vanhofen. His results there are well known throughout the civilized world.
My goal with my 24 flies or insects of the order Diptera, I deprived them of food for three days, or 72 hours. The expressions on their faces indicated to me that they were ready to be fed.
I had collected, for some time, bodies of gnats which I had caught, which are flying insects in the Dipterid suborder Nematocera, especially those in the families Mycetophilidae, Anisopodidae and Sciaridae. Diabolically, they are in the same order, as you probably noticed.
My training consisted of two phases. The deprivation of the flies led to hunger, and through an intricate pattern of facial expressions and gestures, the flies became incensed with the gnats, which was my goal.
I now have a family of flies who eat nothing but gnats. I am free, yes FREE of gnats in my kitchen. I am now attempting to train my 24 well fed flies to visit here, just once a day.