A good tip I would like to pass along to everyone who washes their own van and or car.
When I put the car washing soap in the bucket I also add about 1/3 of a cup of  "Murphy's Oil Soap" it normally runs about $3.50 a quart but at some discount houses they have some xyz brand of oil soap  ( same stuff ) for about $ 1.65 and it is just as good. Believe me when I tell you it makes ALL the difference in the world, no drag what so ever, much easier and it leaves a nice finish...
Try it a few times then post your own thoughts and comments.
regards.
Lamont Cranston.
Some where in North Carolina
90 multi.