When I wash my plane and windshield I put a strip of 2" blue masking tape across the bottom of the windshield. I didn't think about putting a channel on the inside, that's a good idea.

I normally clean the bugs off the windshield with a spray bottle and microfiber cloth.

Thank you John. I really enjoyed this part of the build. The baffles are done in white powder coating. The white makes it easy to see if anything is leaking or cracked.