Answer:
So cold, damp and dark this place. To stay you would refrain, yet those who occupy this place do never complain.
Although I'm not an insect, some people found me very difficult to exterminate. They called me something like 'insane priest.' The first half of my name means the same as 'scrape,' & my last three letters are a metal. Who am I?
Voiceless it cries, Wingless flutters, Toothless bites, Mouthless mutters. What is it?
Pirates put their booty in it.
Though blind as well, can lead the blind well.
You use it between your head and your toes, the more it works the thinner it grows.