How should I clean the tablet and sensor?

From https://support.apple.com/:

“Handle your iPad with care to maintain its appearance. If you're concerned about
scratching or abrasion, you can use one of the many cases sold separately. To clean
iPad, unplug all cables and turn off iPad (press and hold the Sleep/Wake button, and
then slide the onscreen slider). Use a soft, slightly damp, lint‐free cloth. Avoid getting
moisture in openings. Don't use window cleaners, household cleaners, compressed air,
aerosol sprays, solvents, ammonia, abrasives, or cleaners containing hydrogen peroxide
to clean iPad. iPad has an oleophobic coating on the screen; simply wipe iPad's screen
with a soft, lint‐free cloth to remove oil left by your hands. The ability of this coating to
repel oil will diminish over time with normal usage, and rubbing the screen with an
abrasive material will further diminish its effect and might scratch your screen.”

If disinfection of the tablet and sensor is required, please use cleaning products that are
approved specifically for use on touchscreens (eg. PDI Easy ScreenTM). Damage to
hardware due to abuse, misuse, neglect, negligence, accident, improper storage, or use
contrary to the Documentation or Specifications is not covered under warranty. See
Terms & Conditions for details.