Direct answer
Grit usually comes from a dirty or incorrectly seated filter, blocked spray arms, poor loading, low fill or detergent that did not dissolve.
What this covers
- Dishwashers · wash quality
- The exact symptom in the title before component-level repair
- Consumer-accessible controls, connections and maintenance areas
What it does not cover
- ×Smoke, burning odor, swelling, liquid on powered parts or damaged wiring
- ×Opening sealed panels, bypassing interlocks or live-electrical testing
- ×Account ownership, billing or warranty disputes
Observe before changing anything
ReversibleIdentify whether grit is food, detergent or hard-water scale and check which rack is affected.
Isolate the failing boundary
ReversibleClean and lock the filter, rotate spray arms by hand, clear approved holes and verify items do not block movement.
Apply the narrow correction
ReversibleReload for spray access and test a normal cycle with fresh automatic-dishwasher detergent.
Verify the result and stop at the boundary
ReversibleService is appropriate when wash circulation is absent despite correct fill, filter and loading.
Evidence ledger
Sources behind this answer
Visible sources support the visible claims. Home Product Support records the publisher, the fact used and the review date; community reports can suggest an issue but do not become a published fact on their own.
Exact questions
Common follow-ups
What should I check first for “Dishwasher leaves gritty residue on glasses and dishes”?+
Identify whether grit is food, detergent or hard-water scale and check which rack is affected.
How do I know whether the problem is external or inside the device?+
Clean and lock the filter, rotate spray arms by hand, clear approved holes and verify items do not block movement.
When should I stop and request repair?+
Service is appropriate when wash circulation is absent despite correct fill, filter and loading.
Answer for the exact device and software version shown above.