If you remove the valence sheet metal covering the hinge the hinges are secured with machine screws; they sit on a steel cross piece. The hinge could be spaced up with washers or metal shims to lift the whole hinge higher. You could try and do that through the wiper access hatch but the machine screws may just spin when you loosen the nuts holding the hinge. I have some pictures on page 4 of my photobucket that sort of shows the hinges.