Answer:
What cleans as it gets dirty only to get clean the more you use it?
Cold head and feetอพ Round as a ballอพ Always turning around itself.
I occur twice in eternity. And I'm always within sight.
We are two brothers on opposite sides of the road, but we never see each other. Who are we?
Made of ten but two we make, When assembled others quake, Five apart and we are weak, Five together havoc wreak. What are we?
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.