How do I escape?

Hint 1 of 10:

First, Dumb Charlie and Smart Charlie must have left.

Hint 2 of 10:

They leave when you tell them to go to your office for the diamonds.

Hint 3 of 10:

Do you see anything nearby that could cause someone to come to the rescue?

Hint 4 of 10:

There's a fire alarm on the far wall.

Hint 5 of 10:

Go over to the fire alarm next to the fire extinguisher.

Hint 6 of 10:

Try to break the glass on the alarm.

Hint 7 of 10:

It will take your 3 times.

Hint 8 of 10:

The alarm didn't go off, but you broke the glass.

Hint 9 of 10:

If only you had a piece of that glass to cut your ropes with.