I can understand how important it is to have your spray arms working properly. To clean any debris from them just follow these steps:
Begin by unplugging the unit.
Remove the dishracks.
Locate the screw on cap or bolts that are holding the arm in place.
Remove the caps or bolts. Take note of the order any washers that may also be in place that need to be removed.
Remove the spray arm.
Fill a sink or bucket with hot water.
Add soap and one cup of vinegar. Agitate the water to mix.
Place the spray arm into the water and allow it to soak until the debris becomes loosened.
If there are mineral deposits from hot water, soak it in straight vinegar.
Use an old toothbrush, or other scrubbers to clean the surfaces of the arm. Cotton swabs can also be used to remove build up from the small holes in the arm. Tweezers and toothpicks work well to pull out pieces of debris from the openings.
Once the debris is removed, rinse the piece completely with clean water. Spraying it with high pressure water will help to remove any loosened debris as well.
Shake off excess water and dry with a soft cloth.
Replace the arm back into the dishwasher ensuring all bolts and washers are installed in the same order that they were removed.
I hope this helps. If you need further assistance, please reply to this thread. Thank you for using Manage My Life.