input question: fingernails

output answer: can scratch your back

input question: Refresh and renew old windshield wipers.

output answer: Wipe old wiper blades with rubbing alcohol to restore them to good use.

input question: How to access taskbar settings on Windows 10

output answer:
Move the mouse pointer to an empty spot on the taskbar and right click. Click the area that says "Taskbar settings"