It sounds like the car stays pretty clean, doesn't need a "full wash" often (if ever). In that setting, I typically use ONR. A little into a bucket of water; dunk a good quality microfiber towel into it, and wipe the exterior down (moving along the same lines that wind flows over the car), repeat until clean. Doesn't need to be dried, though I'll sometimes use a wetted and wrung chamois (I know, a "no-no" in some minds—but I've been doing it for 30 years and can't understand why).
