Definitely give the clay bar a shot, I've had decent success with that. I'm in AZ (also mentioned before) and yeah, the water hardness is ridiculous out here.
As far as trucks go, I had a proper grandpa-spec gold over tan 99 Ranger (literally from my pa), moved up to an 03 F-350 Super Duty, a 21 Tacoma TRD with the manual transmission, and most recently a 23 Rivian R1T, which I recently sold. Feels weird being truck-less for right now!
And in regards...