I've got a very small setup in a closet consisting of 2 plants, I've noticed what I think are whiteflies...I've read here and there that spraying the plants/soil with a diluted dish soap / water mixture, then rinsing 15minutes later solves the problem, but I am very skeptical. My main question is what is the most effective / least invasive (to the plant/ myself) way of ridding these pests. Is it necessary to get lady bugs? and if so, will they overpopulate and provide a problem throughout the house? any information would help, thanks!