Everyone likes a clean Automobile. Clients will compliment you and tip well however, they will comment and rate a dirty automobile with the same enthusiasm. I have found different products that work extremely well, through trial and error. When I have 'dead' time, waiting for my next request, I do maintenance.
The last thing you want is a product you can not put away quickly or a product that requires extra steps like a paste wax. This is my list of essentials followed by convenient product links on Amazon that I keep in a bin and use on a regular basis, I did the leg work: