Many a time I've used canned air, Q-tips and toothpicks to get into the crevices of my Paperwhite cover and its screen. But as most users can readily attest, after a period of time, despite all personal hygiene efforts, finger tip marks or similar residue will accumulate on the touch screen. The act of opening the cover's lid and attempting to microfiber the screen will be of very short duration as you're now looking at the screensaver/ad page where *any* kind of screen gesture will open you library.
What do other Kindle Paperwhite users do to tidy up their touch screens?
Thanks for reminding me of the power button, Ann. I know it's there but always seem to forget how long a duration of press is required for a specific function, and what a particular color of light emitted signifies as far as "that's enough" or "sleep mode". Come to think of it, on searching for "power off" in the 5th gen Paperwhite manual, the only options are sleep or restart (which I know can also be done within device settings).