Windshield

I have a 2012 gator 825i ..I currently have a Homemade windshield ,made from regular 1/4" Lexan you can buy from Home Depot..That scratches are really BAD.....My problem here is with these Logging Roads you get this fine Dust, so I always take a bottle of water to drizzle on the windshield and then Sqeegy it off..What have you guy's found that works best ...Am taking a trip to Southern Arizona having my Dad as Co-Pilot. Would like a Product that can take the abuse

Thanx Fred