We use the Bio-Groom waterless spray wash! I LOVE IT!!! I will never let myself run out of it! It is great for muddy feet, messy faces, or poo on the behind. Rex is in dire need to go to the groomers (tomorrow-I can't wait) and he managed to mess on his behind on Thursday. He had quite a bit of hair back there so it took a couple paper towels, but it makes messies just slide off.
We also use the Biogroom silk conditioner. I like that too, but find that even though it says you can dilute it if you wish...I use it straight without diluting.
Right now we are using Groomax whitening shampoo and havent tried any of the Biogroom shampoos.