Answer:
If you look, you cannot see me. And if you see me, you cannot see anything else. I can make anything you want happen, but later everything goes back to normal. What am I?
I am the ultimate killing machine used not once but TWICE I can be made by humans.
I describe a toilet cleaner as well as one of Santa's reindeer
You do not want me when you donβt have me, but when you have me you donβt want to lose me. What am I?
What goes through a door but never goes in and never comes out?
I am rarely touched but often held. If you are smart you'll use me well. What am I?