I know that the product says no need to rinse but I do it for my own personal reasons. I feel that I do not want any chemicals on the fabric that could attract dirt.
i spray on the stain then agitate with a carpet brush then proceed to blot with a microfiber. after that I use a extractor with plain warm water to rinse. works wonders every time.
I agree with the others about the wolfgang shampoo. I received some free with an order and was definetly underwhelmed by the product so i use it on wheels and my dg wash is for the rest of the car. Another product i really disliked is black wow. I prefer pb trim restored followed by 303