Not herd of using citrus scents before but would be awesome if it worked. Do mites lay eggs on the birds too? Lice lay white egg clusters around the vent area and can also be up under the wings where it is warm. Is skin so soft an Avon product? I cut the egg sacs off mine that had them too and am still treating them with powder. I have not used Sevin before but its supposed to work well. The expert i talked to said to treat them hard( dust birds, dust roosts, dust nesting boxes, dust the floors and add some to their dust bath and DUST THE BIRDS) for 1 wk and possibly a second week, then lay off for 3 weeks and re evaluate at that time. Sevin is a pesticide and they will adsorb a little since it is on their skin and that is why you don't want to over do it! XXXing my fingers that i only have to do it once and then maintain with DE and i will try the wood ashes too. Lisa