windscreen is fully bonded so must be a gap in the bond. if it starts leaking claim of the windscreen company for a valet and try to get your excess money back for a crap job
could be a small gap in the bond line when they fitted the new windscreen . get them to take a look at it . not enough to let water in but enough to mist up any wind noise when driving
Took me two hours to do my front springs changed to arnott springs. As alot better then the dunlop . only took that long as the front wheel was stuck one side.