If it was a temporary effect that went away on its own after a brief period (VERY videogamey), we could have our ‘don’t ram a bunch of giant mutant mosquitoes unless you WANT blood’ AND not have to micromanage duct-taping windshield wipers and (a)pplying soap and water to our doom mobiles every time we want to go scavenging.
If it goes anywhere, I’d be for a less-realistic cleanup method. This proposal already gives us the realism of consequential gore, which is the fun part of it anyway. Windshield wipers could just be an option that speeds up the gunk time-out period, rather than being mandatory on pain of death shitty windshields and having to wash the car 24/7.