how to repair the seal around the moon/sun roof window? on 2006 Chevrolet HHR

The window in the roof is leaking real bad in the center of the back part of the seal there? What's the best way to repair that? It is very hard to get to with your fingers.

Asked by for the 2006 Chevrolet HHR
google sunroof repairs and see if there is someone in your area that can help