im a simple guy and only use the vary basic as far as detailing gear these days.
just spit and new paper.
i use this: all it is is distilled water with some rubbing alcohol content. very pure and simple..and it works.
it's really the glass MF towel that makes the world of difference imo.
no harsh chemicals, tint safe.
Griot's Garage 11108 Window Cleaner - 35 oz. : Amazon.com : Automotive