Answer:
I am easy to waste and unstoppable
I am the second L in LOL.
I am quick when I'm thin. I am slow when I'm fat. Wind is my worst nightmare. What am I?
The sun bakes me, the hand breaks me, the foot treads on me, and the mouth tastes me. What am I?
I make a loud sound when I'm changing. When I do change I get bigger but weigh less. What am I?
No matter how little or how much you use me, you change me every month.