[OnTheRun2]

This is a very common problem with these cars.
I have talked to a large number of people about it. Including a number of glass professionals.
The common resonance is it is best to just find a good used one and hope for the best.
Repairing your old one will most likely never last. You do not have the proper equipment, nor can you buy the right products to repair it to last very long.
Now before everyone gets there pantys in a bunch. Yes, some have had luck repairing theirs. They are the lucky ones. Most people end up just finding a good used one, and being happy with it for many years.
I was told that when these cars were new that Porsche would not even repair the defective ones. They would just replace it, and trash the old one. Because the repairs would never last.
When I went through this I found a number of good used hatches for a good price. I ended up getting a good one for $100, and have been very happy for over 2 years.