And Ivory Snow laundry detergent is also great. I also add some vinegar to the third tub to clean out any bubbles from the bird so they don't get soap stains.If you do wash them late. BUY Gallons of glycerin. It can help restore the shine. Along with Mineral oil and vetRX for the legs and combs.
I agree with Holm, A seasoned bird exhibitor taught me that too..