If your dishes aren’t getting as clean as they used to, there’s probably not enough water getting into the machine. This is usually caused by a broken or worn out water inlet valve. These valves, located behind the lower kick panel, need replacing every 3-7 years, depending on water conditions.
Inspect and clean your dishwasher. You don’t need to clean the interior of your dishwasher if you use it regularly. If it goes un-used for a week or more and begins to mold or smell bad, you can clean it using Glisten Dishwasher Cleaner.
Soft water is highly recommended. It helps the dishwasher perform as designed. Test for hard water and purchase a water softener in necessary.
Always purge the hot water at the sink until it is hot just before running the dishwasher. This will ensure the first fill is hot. Also, check to make sure that your hot water heater is set between 120-125 degrees. Most units are shipped turned way down. Keep in mind that hotter is not better. Any hotter with these new dishwashers and you get what is called flash drying. This is when the environment in the dishwasher is so hot that after the final rinse, instead of the water running off the glass taking with it all its impurities, it is instantly baked on.