[844PHW]

A number of people (myself included) have gone back to the dealer about this sort of problem. Re-fixing the windscreeen after bonding failure along the top edge seems to be a standard job on the XC60 at least. Sometimes people are charged full rate for the job (£120, I think), sometimes they get a "goodwill contribution" from volvo that reduces the price somewhat. What would happen in your case as you have already fiddled with it, I don't know.