Answer:
What weaves webs as they grow?
Gets rid of bad ones, short and tall. Tightens when used, one size fits all.
Look into my face and I'm everybody. Scratch my back and I'm nobody.
Often held but never touched. Always wet but never rusts. Often bits but seldom bit. To use it well you must have wit.
You can spin, wheel and twist, but this thing can turn without moving. What is it?
What do angels sing in the shower?