I did a bit of a writeup here:
http://www.e90post.com/forums/showthread.php?t=769428
I pried them apart with a small screwdriver. Just went slow with the process. I sealed them back up, but cracked them the 2nd time I tried to take them apart. My glue was stronger than OEM or I made some small fractures that I didn't see when I pulled them apart.