We’re on our second bottle of this soap from Costco and are happy with it.
We don’t use vinegar so I can’t speak for the results of that mixture. Actually none of the 6 companies I’ve worked with before starting our business ever used vinegar so you might be happy just using this soap and water.
Definitely do not get into WFP work…Reverse osmosis wastes more water than you clean the windows with and to make the resin for DI the chemicals used will melt your skin…
Interesting and useful link, @Earthpatterns.
Nobody talks about Better Life products but they are my go to for janitorial cleaning. They also make a dish soap, scented and unscented.
https://www.ewg.org/guides/cleaners/5590-BetterLifeDISHITOUTNaturalDishLiquidClarySageCitrus#.WgWXVmhOmf0
Unscented
Not sure about slip.
Saw them on Shark Tank.
Also, their spray glass cleaner, I Can See Clearly Wow, blows away anything else, performance-wise, especially good on mirrors.
Good suggestions and things to think about, I’ll pick up some Better Life and Kirkland soap to try next chance I get. Thanks!
Just tell me how many years do I have left 
Trisodium phosphate (TSP) is a great cleaner and is also a great fertilizer. Excellent glide but no bubbles 
so I just add a bit to my bucket.
It is banned for household use in some states because it enriches the aquatic vegetation, causing oxygen shortages for some aquatic swimmers.
