My bicycle helmet mounted face screen keeps them out while moving. We call it "MyBugScreen".com and just for safety, it does keep most bugs out of your face, eyes, mouth, ears and nose. Some do get in, but most don't. I'm not supposed to solict here and I'm trying not to, but the screen does add safety to your biking experience.
www.gbnpro.com Just an FYI - Bob.