Hi Neil
Presuming you've done your inspection and all the tests, vac, mist on your favourite microsplitting solution, brush/agitate, or maybe with a towel, and light rinse. Towel dry and turbo. A variation which will have Derek cringing in his deck shoes is, if around the back and sides the towel stays clean, don't rinse. If detergents are used, I would normally acid rinse everywhere.
Safe and happy cleaning:)
Ken