It is on my list of things to do for when I move to a place with access to a hose.When I had the water softener installed here in my home, I made sure a soft water spigot was available in the garage (where the softener is located) for exactly this kind of thing. I don’t know if it makes any difference really during the wash, but a filtered soft water rinse seems like a good idea.
i have a pressure washer from when I used to live elsewhere that didn’t have hard water. But the softener/ filter is my next aim.
I guess in meantime I can use distilled water in a spray canister to get a fine rinse .