Answer:
The sharp slim blade, that cuts the wind. What is it?
I look at you, you look at me, I raise my right, you raise your left.
i'm popular for Knuzlocks what am i
What gets closer when you blink?
Late afternoons I often bathe. I'll soak in water piping hot. My essence goes through. My see through clothes. Used up am I - I've gone to pot.
You use it between your head and your toes, the more it works the thinner it grows.