Why Is My Dishwasher Leaving White Residue On My Dishes?

Why Is My Dishwasher Leaving White Residue On My Dishes? A white, milky film on glassware, dishware and the interior of the dishwasher can be caused by phosphate-free dishwasher detergent. Detergents without phosphates can potentially leave a white film on glassware and other items, and even the dishwasher tub itself. Film is most often observed