In our rural Indiana area we are on well water and of course the homes all have water softeners, unless you customize your plumbing your outside faucets wont be softened water and when washing something big like a car trailer or motorhome on a hot day spotting can be terrible. I really don't know that the home water softener is the end of problem but it helps.
I would like your input [other than dry it off quickly and avoid the sun].
My years as a lobed operator had me to quite a few truck washes were they use de-ionized water as a spot free rinse, that works quite well.
I ponder the idea of using something like a dish wash rinse agent in a garden hose attached tool like some of the fertilizer companies sell for home garden use.
My tight ass is trying to go cheap here, I realize commercially there must be ways to deal with this like car washes do, but do any of you guys have a "home boy" style method for a spot free rinse that works with a garden hose attachment? or other way?
By the way I do dry our cars off with shammy or towels, just getting old and not fast enough.
Also I don't know about a leaf blower on a car or trailer, what do you guys do on vehicle bigger than our bikes when the wash is not going to be followed by a wax? Any chemists out there that know what in what proportion might be worth trying?
Thanks Randy