Well, if you always give your bird baths with warm water and dry her with a blowdryer that might very well be the cause of her itching because the warm water and the hot air would dry out the natural oils on her feathers and skin and make her itch. That's why you always read that birds should always be bathed in cold or room temperature water only and allow to dry naturally in the sun. Next time, use cold water with aloe vera in it. It will help a bit.