Answer:
I must be broken before you can use me.
I spend the day at the window, go to the table for meals, and hide at night. What am I?
When you stop and look, you can always see me. If you try to touch, you cannot feel me. I cannot move, but as you near me, I will move away from you. What am I?
What goes through a door but never goes in and never comes out?
I have a small hill with seven holes.
No matter how little or how much you use me, you change me every month.