I purchased a de-ionization filter station, can wash directly in CA sun during summer w/out spotting. Use wax wash combo suds and hose it off. Keeps rig shining
I have an excellent mechanical shop in Ramona, CA called Tanquays. Owner David really takes care of my 2015 American Coach w/ Cummins 450 hp and all the tecky things involved. Small shop heavy on getting things done CORRECTLY and on time.