Sphaerobolus stellatus ("sphere thrower") The Artillery Fungus (aka, Shotgun Fungus)
Washing this Ranger has evolved into a 3-day learning experience. One day I might rival
Cliffy Claven as an encyclopedia of useless information.
When you do a good job washing a vehicle you are forced to inspect every square inch. There are hundreds of little black spots on this truck. Some so small they are only noticed by feeling with your fingertips. I meant to get them all off. They might be what's left of old spores from the Artillery Fungus (see above video). I always assumed the specks were left by bugs.
As soon as the truck dried off, hundreds of little white flies congregated all over it. Turns out they are a species of water bugs, attracted to highly reflective light sources, in particular red and black (Go Dawgs?).
"Research shows that red reflective surfaces create a specific, highly attractive horizontal polarization pattern that strongly mimics that of water. Water insects (including bugs that may appear white or light-colored) are "red-blind" in this context but react heavily to the light reflected from shiny red surfaces." 
Next. There appeared to be no molding around the windshield. Just an empty channel. Did they forget to install the molding? No, they now glue windshields to the body and leave a crack around the side. There is tiny molding attached to the glass. But urethane glue is what makes a watertight seal.
This crack fills with numerous seeds, oak blossoms, pine needles, dead bugs, and various other decayed matter. It can be forced out with water from a hose. This actually may be a good thing because that old rubber molding was one of the first things to deteriorate, and it just traps moisture and causes rust. Trash in the channel traps moisture also, but that puts the onus on the owner to wash it.
Finally, this truck does not like to be washed. Various lights start flashing. It appears to be especially ticklish around the door handles. You need the key fob to open the doors and the tailgate, but apparently you have to
hide the fob to wash it. If I hide the fob, will it then think I'm trying to break in and start tooting its horn? Some cars now have a "washing mode" setting. You only have to memorize the breadcrumb steps to set it up on the infotainment system.
There is much, much more, but this is getting 'way too long. As soon as I get the tires washed and shined, I may post a picture. Meanwhile, it's lawnmowing time again.
The least I could do for it in return, is try to find out what specifically was causing the problem.