Continue heating the outer edge of the front panel and using guitar picks to separate/space the front panel from the rear panel.

Insert two guitar picks as placeholders on each side of the iPad.

When prying up the glass take great care near the lock, mute and volume. The ribbon cable is fragile and is often glued to the digitizer. It will tear easily when the glass is pried up. Working from the lock button downward and staying flush with the underside of the glass will give you the best chance of not tearing the ribbon cable.