It was time...
Today, I changed out the 5 year old membrane in my RO/DI system. And while I was at it, I decided to document the process, so that anyone that has one of my RO/DI systems will now know how to change the membrane.
I took plenty of pictures, so a couple of other related pages were updated as well.
How to change the membrane - new
Troubleshooting - updated
Installation Instructions - updated
The old membrane was literally ripping itself apart. Look how both the membrane and the black gasket were forced to the left over time.