I've never fixed a leaky one. I have taken the inside plastic pane out and scraped the tinting off. Got one more to do, in fact.
I carefully drilled a few holes on the inside plastic, then broke the plastic. Be careful pieces can be sharp. It does make quite a mess.
2003 GMC 2500HD 4X4 D/A Ext. Cab
Propane Powered Honda EU2000i
Lots of Hot Sauce!
Air # 283