This is where I first learned you could do this:
Step 1: Open it up
The two halves will come apart and out drops the circuit board with wire/etc attached.
Step 2: Unscrew the lense assembly
I'm not sure but I think maybe the CCD can be harmed if you shine bright light directly at it (without a lense assembly in front of it) so I hid it away under a piece of paper while doing the rest of the steps.
Pull the lense assembly out from the surrounding knobby thing (the blue ring that you turn to adjust the focus)
Step 3: Get in there
To pry all of these away without snapping the lense would not be easy, so I filed away on a side where the threading is to have access to the edges of all the layers (lense, plastic thingy, etc).