I am collecting a rather large community of aphids on my parsley plants, despite random spraying with an organic bug killer (Growing Success Veg and Plant Bug Killer). I held the pots upside down and gave the plants a good soaking with it in the evening at least three times over the past couple of weeks. Even if it's organic, I still don't like the idea of spraying too much mystery liquids all over something I will soon consume (if the aphids don't get to it first). Anyone have any suggestions of what works for them?