2005 Chrysler Crossfire - opening back hatch manually

how do I open the back hatch manually?

The release handle is above the license plate, the doors must be unlocked for the handle to operate. If the trunk won’t unlock the lock actuator may have failed.

Have one and noticed that the release lever sometimes gets a little touchy.

Assuming locks are released (lock and release a couple of times), be sure the release lever is returned to it’s normal position and try again.