We've owned our coach since new. In the first 6 years, it got washed before every trip and waxed at least 4-6 times a year. The front 3M shield gets either 303, Plexus, Pledge or wax before every trip. Nothing sticks to it.
In the last couple of years, the knees and back have been acting up. It still gets washed before every trip and waxed quite often. The only difference now is I do it in sections. Sometimes with a nap about half way.:Z
As for tips, I use a soft brush on a pole and Meguiars car wash soap that I keep in a dish soap bottle. I squirt about a 6" long squirt on the brush and can wash half of one side. I rinse and do the other half. I still get on a ladder and dry with cotton towels, but you can also wrap a towel around a push broom and dry the sides. Just move the towel around the broom to the dry sides of the towel.
Now...don't forget to wash the generator and it gets a coat of wax once a year. The roof twice a year.
I've always advocated what the "Executive" stated.....you really get to see little issues developing when you clean your own coach. I also do all of my own engine servicing which lets me see issues developing on the underside too. Now that I'm getting older and things are getting tougher, I have a different opinion of older people with dirty coaches.....some just can't physically clean them.
Don & Mary
2019 Newmar Dutch Star 4018 - All Electric
2019 Ford Raptor Crew Cab