Let’s pause for a safety moment, because I’ve seen people try to use their teeth. Do not use your teeth. Your teeth are for smiling and eating pizza, not for fetching a razor blade like a golden retriever.
Also, never try to snap the blade in half with bare hands. I know it looks easy on YouTube, but those people have calluses made of pure audacity. The blade will win, and you will lose a fingerprint.
How To Get Blades Out Of Disposable Razors at Jennifer Lyman blog
What to Do With the Blade Once It’s Free
You’re holding a naked blade. It glints in the bathroom light like a tiny, evil promise. Do not throw it in the trash. That’s how garbagemen get ninja-level injuries.
Wrap it in several layers of tape, or stick it into a razor blade bank—yes, that’s a real thing, and yes, it looks like a piggy bank for murderers. You can also use an old tin can with a slit cut into the lid. Just label it “Do Not Touch Unless You Want A Bad Time.”