+1 We always laminate and apply dry
More important than wet or dry -----I say dry by the way----- could be 'What's on the glass?'...
If the vehicle is factory new, you may have a problem. Also, is the customer a 'Rain-X' user----that stuff will cause no end of headaches when it comes to adhesion....
If the vehicle is brand new, or Rain-X/a rain dispersant has been used, you will need to clean the glass many many times with degreasers and alcohol based products before you want to apply....
Oh, apply DRY....has that been mentioned??