How do these messages suddenly appear on dirty, unwashed vehicles?

You know your car is in serious need of a good washing, but you just haven't had the time to hose it off yourself or get it to the local "touch less" carwash.

But today, as you prepared for the morning work commute in your mud-ravaged vehicle, you noticed a suspiciously odd message scrolled, scribbled, or possibly etched into the heavy cake of dirt on the rear hatch of your car.

As you looked closer to examine the peculiar mud markings, you notice a remarkably clear message:

"Wash Me”.