Wow, thanks for the info! Didn't think it could be done DIY. Heard about camera hospital so I sent it in for servicing and at the same time change the light seals. I'll try DIY another time On another camera if I come across sticky light seals again.
Btw, how do you change the light seals at the joint of the camera? It's like hidden behind a metal piece that holds the cover together with the camera when the cover is open!