What should I do in Von Zell's room?

Hint 1 of 12:

You mean to tell me that after going to all that trouble, you don't know what
to do now you're inside?

Hint 2 of 12:

Shame on you!

Hint 3 of 12:

Where is your spirit of adventure?

Hint 4 of 12:

Why you should snoop, of course!

Hint 5 of 12:

Did you know that you can actually get inside this bathroom?

Hint 6 of 12:

Have you examined the bathmat?

Hint 7 of 12:

What's that underneath the mat?

Hint 8 of 12:

Maybe you should look at it a little closer.

Hint 9 of 12:

Did you notice the wallet sitting on the nightstand?