Review on Gunk M506 Concentrated Windshield Washer Solvent: Powerful Ammonia Formula - 6 fl. oz, Blue by Peter Alradwan

Fairly good for removing light to medium dirt on windshields. However, if you drive through a swarm of flies on the freeway near a dairy farm or park under a bird tree and the sun burns bird droppings onto your windshield, all you have to do is get your windshield dirty. I've used better washer fluids than this but it's ok for the price.