My extent search for the way out of this trouble led me to Anti-Fruit Flies Solution by Holly of Spend With Pennies. It turned out that these bastards like the smell of apple cider so by pouring it into a cup and preparing a cone entrance you lead them straight to the trap. Voila!
Give a try to smart problem-solving way. If you have other non-toxic methods of doing away with other pests drop us a line!
Check out the recipe on Spend With Pennies.