Here is what I am doing to maintain my sunroof.
Please add to this thread any suggestions you have for sunroof maintenance
The aftermarket has already created a spacer to mitigate the shrinkage of the seal that I pictured and attached to this thread.
I am applying Gummi Pflege to the seal to keep it soft and to help slow its degradation.
Right now my gap is very small.
Note: I am also conditioning the entire edge seal as well as the seal for the back of the front glass and the inside seal as well.
I am targeting every month to condition the seal.
Note: if you start doing this you will quickly realize that the doors have flexible rubber seals too. I am conditioning them also
Take care
Paul