You've definitely used dry-erase markers to mark up a whiteboard in a classroom or at the office—they’re so ubiquitous, they’re even replicated in apps that allow you to keep a whiteboard in ...

You can also use baking soda and water paste to remove permanent markers from plastic. Who hasn’t accidentally written on a whiteboard with a Sharpie instead of a dry-erase marker? It is such an ...

But a dry erase marker won’t turn any heads. And this one holds its own little secret. It acts as a master key for hotel room door locks. This is really more of a repackaging hack. The exploit ...