When it comes to dishwasher detergent, I usually just buy whatever is on sale. I haven’t been super loyal to one brand over another. Funnily enough, I am brand loyal when shopping for other cleaning supplies. (I know. It makes no sense.) And so I recently decided it was time to settle down and pick a brand that I could stick with. But which brand to choose? I turned to plumbers, who, in this case, certainly know best.