I ran my car through a touchless automatic car wash today (I had the windshield replaced three weeks ago and needed to test it for leaks). The car had a bunch of crud on the hood from a combination of road grime and then just sitting for a while. It wouldn't come off in the automatic wash. Does this sound like something that could need professional attention or do I just need to find a way to get the car hand washed so there's some scrubbing done rather than just spraying?