Cage cleaning but no bleeding

You know, I can't touch Jade except her beak and then only when she invites me (hard to describe, but I recognize the body language). That's how I "kiss" her. She's always been really aggressive and her cage was once forbidden territory, so changing paper, filling dishes, anything like that meant I was going to look like I'd gone a few rounds with a buzz saw. I finally decided I was just going to have to grit my teeth, take the bites, and try to desensitize her. Figured if I did it often enough and the world didn't end, she'd get the picture, and it worked. I took a LOT of bites first, though. Eventually, she realized I was just changing paper and filling dishes, not stealing her stuff. For her birthday a couple of years ago, I emptied her cage and threw away her worn out toys and stuff and replaced them with all new stuff, and she thought that was pretty cool. It wasn't easy to get it all done, but we managed it, she and I, and she didn't bite, though she lunged a lot. Now this cleaning job on Monday when she didn't even lunge. She asked "whatcha doin'?" several times. She had to sit RIGHT THERE and supervise. But no bites or lunges.