Answer:
Hard to catch, easy to hold. Can't be seen, unless it's cold.
People are hired to get rid of me. I'm often hiding under your bed. In time I'll always return you see. Bite me and you're surely dead.
My second is performed by my first, and it is thought a thief by the marks of my whole might be caught.
Of no use to one, Bliss to two. Men lie for it. The baby’s right,
My first is in window but not in pane. My second's in road but not in lane. My third is in oval but not in round. My fourth is in hearing but not in sound. My whole is known as a sign of peace. And from noah's ark won quick release.
I’m grown from darkness but shine with a pale light. Very round I am and always a lady's delight.