After many dollars and years of washing cars the easiest on & off I have found is...
I came to the same conclusion, although I use a different brand (the one Walmart sells as antibacterial). I do, however, wax the car once a year with a car wax that was also the result of many years of trial and error - 3M hard wax, part# 39526. You can see the image of the can in the photos section under the tab "Technical Items". I tried Turtle Wax, Maguair's, Zymol and all the other crap sold at Walmart, but their protective effect was gone in 3-6 months, tops, and then water began forming continuous film on the paint. Then I bought a can of the Scotch stuff and my search for the best wax was over. Yes, it is expensive at about $20 per can, but since you will be waxing the car only once per year, it is effectively wash with the $5 a can Walmart junk, of which you will use 3-4 times as much. When the diesel gate exploded in the fall of 2015, I decided to test how long this wax would last past the 1-year mark. So, I washed the car, dried it and waxed with the 3M wax. After that, I only washed the car with the dishwashing liquid when it got really dirty. Every time I did that, the beading effect was right back. I washed the car for the last time in June of 2018, about a month before returning it back to VW, and the water was still beading on the paint after almost 3 years. None of the waxes I used in the past came anywhere near the longevity of this product. So, if you hate waxing (and, most of all, polishing) your car, this wax will make you happy.