im a firm believer in room foggers got 2 have right chemicals in fogger ,,gnats i usually battle mites spray wait 2 days and spray again somthing about killing the eggs larve but i kill mites not gnates not yet
I have heard if you mix soap and water at a 1:10 ration it should kill soft bodied insects. I have heard GREAT things about Neem oil. I know its available at specialty stores, I would think you could find it at Home Depot or something too. GL
SP