Something hiding under your bed and little creatures

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.
What am I?



We are little creatures; all of us have different features.
One of us in glass is set; one of us you’ll find in jet.
Another you may see in tin and the fourth is boxed within.
If the fifth you should pursue it can never fly from you.



Answers below.










Answers: Dust, and the vowels.