Where is the soap?

Hint 1 of 6:

There's some in the jail.

Hint 2 of 6:

Go into the Town Hall, and enter the cell.

Hint 3 of 6:

Get the soap

Hint 4 of 6:

You'll be trapped, though.

Hint 5 of 6:

So, create a way out.

Hint 6 of 6:

Shoot the wall with your gun.