I have a St. Bernard and little Gertie, so my patio door gets sooo gross!! I use white vinegar to cut thru it and then Windex. Magic Eraser is also good, then Windex.Yes, yes, snotty glass doors that you CANNOT clean...my mom comes in once in a while and tries to clean it off to no avail. Any ideas how to get bullie muck that's been cooking in the Arizona sun off a sliding glass door? I've tried Windex, Simple Green...the usual suspects. Nothing really works.