Yesterday i gave my girls a drenching of Gnatrol in hopes of getting rid of the nasty gnats. Info about gnatrol on the web is kinda inconsistent, different people and different places that sell gnatrol all seem to have there own instructions. My question for the forums Gnatrol users is this: is there a need to flush with plain water after the drench? Also, what amount are you all mixing with a gallon of water? So many different recipes out there, i ended up going with 3 teaspoons per gallon of water at a ph of 6.5 for a heavy infestation.