I just bit down on the bottom with my back teeth and pulled and it came right out! But, if you don't want to use your teeth, you could use pliers.
Step 3: Getting Out Ink
After you take out the bottom, you will see an ink tube thing, that's easy to get out. Just get a pencil or a paper clip and poke it into the ink tube and pull. It will come right out.
Also, open the lid and pull out the tip with your finger nails or fingers. That also comes out easy.
You actually don't have to remove the tip because if someone picks it up and realizes there's no tip, it might give it away.
Step 4: Cleaning ( Optional )
You may want to clean out the marker, but you don't have to.
Step 5: Now Your Done!!!
You now have a secret compartment marker! You can put money, notes, or messages in it. You can take it to school and no one will know!