If you use a metal safety razor—the vintage, grandpa-style shaver—you’ve already shown you’re a person of taste and danger. Taking the blade out is a careful, surgical dance.
How To Get Blades Out Of Disposable Razors at Jennifer Lyman blog
Unscrew the handle. The blade will drop out, but it will also stick to the wet, soapy head like a stubborn piece of bacon. Don’t flick it. That’s how you find a razor blade embedded in your bathroom wall five years from now.
Instead, gently pry it off with the magnet. Most safety razors have a little magnet in the base to hold the blade—use it. If yours doesn’t, gently nudge it with the edge of a hardcover book. Yes, a book. It’s classy and functional.
Where Does It Go? The Real Question
Now you have the old blade. Do not—I repeat, do not—throw it loose into the trash. It will poke through the bag, terrorize the garbage man, and possibly haunt you in your dreams.
You need a "blade bank." This is just a fancy term for a metal or heavy plastic container with a slit on top. I use an old tin of Altoids. It feels like I’m making a cursed mint collection. Others use a glass jar with a twist-off lid.
Think of it as a retirement home for used blades. They go in, they never come out. When it’s full, tape the lid shut and write "SHARP" on it in permanent marker. Then throw it away with a clear conscience.
Safely Removing Razor Blades From Plastic Handles: A Step-By-Step Guide