Pearl, just like any (permanent) adolescent, is quite skilled at making a mess.
She can take the simplest of materials – seed, paper towels, and (of course) cockatiel poop, and redecorate the entire inside of her casa.
At which point Mommy necessarily shifts into “maid mode”, complete with toothbrush, scrub brush, gloves, bucket, soap and a hose, and goes to work.
Pearl doesn’t enjoy the casa cleaning. She (like her Mom) enjoys being in control. Watching her cage being systematically dismantled and scrubbed is unnerving. So she screeches throughout the process to make sure it is clear that she is displeased.
This of course makes it even more enjoyable for both of us.