Due to the gentle and natural makeup of Shampoo B, the formulation tends to be much thinner than the commercial products most people are used to. You can feel free to experiment with adding in a small amount (1/4 teaspoon) of xanthan gum if you wish to make it thicker. As for rinse solutions, these treatments are typically applied to sit on the strands following the shampooing step. The purpose behind rinses is often to nourish, moisturize, color, or even remove product build-up. While Shampoo B can be a wonderful shampoo to use in your daily routine, we generally don't recommend leaving it to sit on your strands as its intention is to effectively cleanse your scalp and this is what each ingredient is geared toward. If you do choose to experiment with it as a hair rinse, we do encourage you to leave it on your strands for as little time as possible.