Repair men will tell you liquid detergents of any kind wear out dishwashers and washing machines much faster. To say nothing of all the stabilizers/additives and dyes. The best thing to clean with is powder to make your machine last. Also shipping water (liquids mostly water including pods) is a bad idea in terms of weight and cost. Liquids and pods are great for driving new unit sales. Tablet seem to be in the middle but they of course caking agents use to make them into pucks... why not just use powder?