Mystery of the Demagnetizer | What’s inside? How does it work?

I have always wondered how the inexpensive magnetizer-demagnetizer tool works. What’s inside it? And why are there stairs inside the demagnetizer opening? According to most sources the stairs are important, but the explanations are vague at best. In this video, I will do some investigation and open the tool to finally figure out how it really works! And show how you don’t need the tool if you have a bar magnet... The F71 Teslameter donated in 2018 by Lake Shore Cryotronics: See how precisely it determines the strength and surprising direction of the Earth’s magnetic field at my place: My Patreon-page: Links for some of my other videos: Unboxing a monster magnet: Buyer’s Guide: Your first neodymium magnet: Cola is perfect for lowering a laser’s power!?!: Did you miss one of