You need Just 2 things: REGULARLY CLEAN THE DISHWASHER FILTER! And once a month do a clean cycle or any hot water cycle of your dishwasher with a glass full of vinegar to remove any stuck food particles or residual detergent left behind. White vinegar is considered a great DIY cleaning agent for household maintenance. The vinegar will disinfect the dishwasher, break down calcium accumulations on the heating element and any residue stuck inside.