I was hesitant about “waterless” as well. But three years ago with a new truck, I decided to try ONR (Optimum No Rinse). It is great and not truly waterless. You mix up a few capfuls into a few gallons of water and put some of that solution in a spray bottle. You spray the panel and you use a soasked MF sponge (from the bucket) and go across it working top to bottom. Then you dry the panel with a clean MF towel. You only use a few gallons of water since you aren’t constantly rinsing off soap residue. What I love is that the ONR acts as a water softener so you don’t risk hard water spotting. In fact, you could use this in the sun (though I don’t do tha).. ONR offers a sealing/drying agent that you can use in the drying step which is nice since it saves a step. I find using ONR to be less hassle and I can wash my truck in my garage. It is really nice too for cleaning door jambs and other detail areas after your wash and dry. Just spray the microfiber and clean away.
