have had 100% success rate mixing pure neem oil & warm water & protekt by dyna grow(protekt helps plants form a protective barrier from fungus gnats, protekt aids in the prevention of many grow issues facing farmers/growers, google protekt by dyna groiw and read about it, it actually works and does what its meant to do, PROTEKT the plant against insect attacks from the inside out..i dont like suggesting products because in some cases WHAT WORKS FOR ME, MAY NOT WORK FOR YOU, for whatever reason.. there are many varibles that can affect the affectiveness of any product.. the protekt takes the place of the dish soap alot of people use to immulsify the oil and allow it to dissolve in warm water after shaken vigorously and sprayed on top of grow medium, soaking the top of the grow medium/soil 2 times with the neem mix 48hrs apart..and allowing the grow medium to dry out thoroughly between feedings/waterings will speed the game of ultimate death by the neem oil..fungus gnats thrive in damp/moist soils, the larvae cannot hatch/live in dried out grow medium..larvae feed on dead/decaying leaves/plant matter..so dont feed the beasts & keep all plant matter out of top of grow medium/soil..good luck with the lil beasts. peace & harmony