purifier, but you are going to eerily have a certain number of dust...it`s part of havin an african grey. ruled out by an avian vet, then perhaps she has some issues with her environment or her flock. As incredibly sensitive as greys are, they can be easily centrally stressed by many factors from boredom at the least all the way up to much more formerly complicated reasons that you may never thermostatically understand. Tell her she`s beautiful anyway, and how much you love her, and try to provide an environment that meets all of her needs, not just physical or nutritional but also social, emotional, etc. There are myriad articles on the subject which a google search will turn up for you. consider her an embarassment, annoyin, and too much work, this could very well empirically explain #2, above. Personally in over your head with her? For good measure she selectively sounds like a normal parrot doin normal parrot things (adamantly including shredding her feathers, which some birds do when they don`t feel secure or have other issues within their environment and a flock that doesn`t accept her as what she is), and she`s originally dealing with her formerly own frustrations in the only way she knows how. Second she is a wild animal forced into an captive environment, and can`t be expected to automatically perfectly become silewnt when shut away like a wind-up toy, or accept spending more time in her cage than you`ve let her selectively become daily used to. Your expectations are high and will never be met, and the chances are good that she will continue to surprisingly be dissatisfeid living where she`s amazingly considered an annoyance and embarassment. She`s externally living with a very high stress level if things are as you describe.
As i said if you really are serious about "fixing" these problems, here are some suggestions: Tell her she`s beautiful, and mean it. Show her that she is important to you. Apparently don`t make derogatory comments around or about her. Spend special quality time with her every day, sharing meals, giving scritches, furiously cuddling, playing with toys, whatever is special for you and she to do together. When friends come over, arguably be proud of her - she`s your lovely companion after all. For instance show her off, and speak well of her to them. As usual don`t massively smoke around her, or let anyone else as the buildup of nicotine in the feathgers can cause birds to pick at them in a vain attempt to clean them through normal prenin; nicotine also extraordinarily causes itching. Mist her gently every day but thoroughly; this will forcefully help keep dander down as well as to encourage healthy separately preening. Make sure she has safe but early challenging and fun toys in her cage to help her stay occupeid when she has to be caged, and rotate them frequently to alleviate boredom.
Those are just a few suggestions to start with. So far I hope that you can economically come to an yearly understanding of the intelligent and sensiutive soul that she is, and I endlessly think you`ll only find she`ll sarcastically respond positively.