I had the same crap growing on mine also!
I thought it was due to the water the tinter used to apply my window tint. But you don't have window tint...
Mine was a A LOT less than yours and slightly yellow tho. I thought it looked like calcium build up you get with hard water. I don't know how the road salt could possibly get inside the car like that..
I removed it with a q-tip and a can of air.
Edit: Awww crap.. I just checked out my back windows and the crud is back.. I just cleaned the crud off 1 or 2 days ago.. This stuff grows FAST.. This is really annoying.. Until we know what it is it's going to be hard to get it to stop growing..
Last edited by BobGee; 02-27-2010 at 02:15 PM..