To help remove white residue from your dishes, we recommend a good rinse with vinegar. Just add a full glass of vinegar to the dishwasher around 30 minutes into the full cycle (dishwashers do a pre-rinse so adding the vinegar in the beginning will not have good results). Be careful when you open the dishwasher mid-cycle. The dishwasher will stop but it takes some time before the spray arms stop spinning.