Hi. My Jenn-Air DW860B DISHWASHER does not clean as well as it used to. The inside of the dishwasher stays a little dirty and plates and glasses aren't getting as clean. I've looked at the spray arm and it appears not to be clogged. The water gets hot still. Any ideas on how to improve performance?

Another thing to check is the water level.
Most units fill to just under the heating element.

If you suspect a low fill problem you can check it by adding a quart or two of hot water after each fill during a cycle. If the dishes wash OK now then low fill is the probable cause of your problem.
Often the pump will growl when it s starving for water.
Just be careful to not overfill the unit.

Usually low fill is due to a partially clogged fill valve.
Remove the valve and check/clean the screen filter on the input side of the valve.
Do not permanently remove it as it is there to keep crud out of the valve. This could hold the valve open and cause a flood.