Magnesium Chloride liquid de-icer .....
Those of you who live in Colorado , especially in the Denver Metro area are very familiar with this stuff. It's been around for years and the Colorado Department of Transportation is especially generous in spewing this crap around every time the temps drop.
While I'm sure that this keeps us all safe from turning our roads into maxi-luge runs, my little blue VW Bug Gretta hates it. From about mid October until way into April I can't keep her clean. No matter how hard I try it's like she's been dipped into honey and every single piece of dirt/grime on the road gets stuck to her. No amount of washing can get this stuff off. Just when you think you're safe, some idiot in front of you will try to text/eat/put on lipstick/shave/etc. and veer off the dry pavement onto the shoulder where it's still wet and now i'm stuck looking through a windshield that's almost black with grime and a blue car that is now some un-godly shade of post-modern gray.
I almost give up trying to get the shite off my car , but then one of those beautiful days come along in CO ( you know the ones i'm talking about , early February , 70 degrees , t-shirt/jeans ) and i'll think " today is a great day to wash the car ! " Then two days later the weather forcasters come out and say that maybe it will snow& here come the trucks dumping the Mag all over the streets again.... it's a losing battle.
And don't get me started on sand/gravel & cracked windshields .....