After using almost every washer fluid solution from $1.00 all the way up the line to $5.00 per gallon there are two things I can tell you without a doubt. The first is that NO washer fluid solution takes the place of hand washing your window. The second is that dollar for dollar, pound for pound, Prestone Bug Wash at about $2.00 a gallon is the hands down winner. Living in a rural CA town I can tell you the bug situation out here is brutal. A clean car can look filthy with bugs on the grill after only about 50 freeway miles. The Prestone stuff cuts dirt and bug carcases better than anything I have ever used, including Mcguire's pro series stuff that cost me $5.00 a gallon!!! The only tip I can give to other G6's owners with a bug problem, when you hear that thud sound of a bug splattering your winshield, use your washer right away to cut the mess, waiting for the next time you wash your car makes them 10 times harder to get off, especially after they have been baking in the sun!