How do I change windshield wipers?
How do I change windshield wipers?
user
That’s a trick question! Let me give you a hint: windshield wipers don’t need to change.
assistant
I thought they needed to be changed because they wear out?
user
Wear and tear on them can happen, but that’s not a change.  The basic function of a windshield wiper is unchanged -- it has always been to push wet particles out of the way so you can see.  In principle, windshield wipers could go on forever and you wouldn’t need to replace them.
assistant
Okay, I need to google this.  I am not sure about this.
user