Definitely get some of the baby parrot food into her- it has all sorts of vitamins in it and they generally LOVE it. I think if you make it fairly runny, you can spoon it to her, maybe you'll have to force to start, as she'll be nervous about it. Dip her beak into a spoon of it and watch for her shaking it all over. The liquid in it will help, too, but don't rely on that being her only liquid.
You're a good mom to work so hard at this- I really hope she pulls through for you, and that you don't feel too awful if she doesn't- I know it's really hard to watch and feel helpless.
Go, Cheesy! Eat and get stronger!!