Getting the soda (coke here in the south, we don't say soda) out of the keyboard seems to be the thing that will get you, just drying won't fix the inevitable. My 4 year old swears she didn't spill anything on my 8703e
but the keyboard mysteriously got sticky when pressing the keys.
Modern electronics should all come with a label that says "No user serviceable parts inside", or provide you with a way to take them apart. After all you OWN the device, you should be able to do whatever you want with it.
Enough ranting... If you have taken the torx screws out and still can't get it apart, you are probably going to have to apply some nerve wrecking pressure to the sides with a jewelers screwdriver to get them apart. I wish you success, and please post the photos when you are done just in case my four year old comes back to me with my 8830 and says "I found your phone Daddy."hehehe