Originally Posted by maxcichon

NO NO NO!

No razor blades. No vice grip. There is no glue. Bad advice!

Unscrew the bottom tapered "nut" until it's loose. Make sure it, and your hands, are very clean. You are relying on friction to unscrew it. It is silver-painted plastic. Pretty much any tools will scratch it. Wiggle the **** a little and pull straight UP. And, like Pooly said-don't hit yourself in the teeth when it pops off. It's very tight.

Good luck.