So I bought this MG organic soil at stupid walmart and the soil had sat outside obviously b/c it was way wet had to leave it open outside a day before using it to dry some and either sitting at my house or at walmart or SOMEWHERE knat eggs were layed in it b/c now I have a bunch of knats flying around in my f'n closet. What is a cheap easy to get anywhere kind of solution for these pesky rascals? I am mid flower on half the plants in the room if this at all matters.