[Grumpy old man]

Once you have it cleaned out consider going a little bit further and use a wire brush to clean all the seams and corners that you can reach , Then use high pressure air and the vacumm again . Then using a paint brush give it all a good coat of epoxy primer let it dry and seam seal all the seams / cracks /etc and spray some good Black semi gloss paint to finish it off . A set of cowl screens will help from it getting clogged with debris again . Don't forget to grease your wiper transmission before closing it all up .