There's 2 ratios at play here. The foam gun output ratio and the suggested shampoo dilution ratio. That's the math and it's black and white. Some people like to work out the numbers in their heads. But then there's the intangible human factor. What works for one may not work for the other, or we may find both methods work for different people! So I don't disagree with you at all! :xyxthumbs:I just put it on A (1oz/gallon).. no water needed and the directions do not state to add water