Answer:
When they are caught, they are thrown away. When they escape, you itch all day.
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.
What gets closer when you blink?
What can you fold but not crease?
What starts with a 'T', ends with a 'T', and has T in it?
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.