No kitchen is complete without a dishwasher. These appliances will leave items sparkling and streak-free in a single cycle — pots and pans included. It’s the better option when it comes to using the dishwasher vs washing by hand. But, with ongoing use, even the performance of the best dishwashers can dwindle. Food residue might escape the wash, or water marks could crop up on glassware. In short, your trusted dishwasher struggles to clean like it used to.