The glass front panel on the third generation Touch has a plastic frame glued both to its outer edge and also under the wide black strips at the top and bottom of the device.

The picture at left (front panel already removed) shows the locations of the metal clips (shown in red) that snap on to the plastic frame. In the next few steps, try to pry the front panel up from the gaps between these clips.

Also, be mindful of the very thin and delicate touch screen ribbon cable (connector location shown in green) attaching the front panel to the upper left corner of the Touch.