Nice and streak-free though!
From the submitter:
The vacuum cleaner was missing those floor cleaning accessories, so I made my own with isolant tape and a box.
OCD in the retirement home can be a serious problem.
She's doing it all wrong, actually. It's much safer to remove the keyboard and really scrub those circuits. And be sure to use a mix of 2:1 Ammonia to Bleach for maximum effectiveness.