Please go thru this list that i have provided for you and check each item ok
It doesn't get the dishes clean
1. No water
Make sure you get water to the dishwasher. Check to see if the water
shut-off valve (located under the sink) is open. If you get water to
the dishwasher, but there is still no water inside during the fill
cycle, the problem might be with a faulty water valve (located at the
bottom of the dishwasher, behind the kick panel, on either side), in
which case replace the water valve.
2. Not enough water
If there is not enough water, the dishes would not get cleaned. This
could be caused by a partially closed water shut-off valve (located
under the sink), or a faulty dishwasher water valve (located at the
bottom of the dishwasher, behind the kick panel, on either side).
3. Clogged spay arms
There is usually two, sometimes three spray arms in a dishwasher. Make
sure there is no debris blocking the holes inside each spray arm.
4. Water temperature is too low
To get the best results, the water has to be at 120 degrees Fahrenheit when
entering the dishwasher.
5. Not enough soap
If you only fill one part of the soap cup, try adding soap to both parts.
6. Smoky film on dishes and glasses
This problem occurs due to excessive calcium build up inside the
dishwasher. Try cleaning you dishwasher using a dishwasher cleaner.
There are a few out there, we recommend