Direct answer
White film can be hard-water mineral, excess detergent or undissolved detergent—not necessarily food soil. Whether vinegar dissolves a sample helps distinguish mineral from etching, but follow material and manufacturer limits.
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
ReversibleRub a spot and note whether it is chalky, gritty or permanently cloudy.
Isolate the failing boundary
ReversibleCheck water hardness, rinse-aid setting, detergent type and incoming hot-water temperature.
Apply the narrow correction
ReversibleAdjust measured detergent and rinse aid and run the manufacturer-approved cleaning cycle.
Verify the result and stop at the boundary
ReversiblePermanent glass etching will not wash away; do not keep increasing detergent.
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 a white film on dishes”?+
Rub a spot and note whether it is chalky, gritty or permanently cloudy.
How do I know whether the problem is external or inside the device?+
Check water hardness, rinse-aid setting, detergent type and incoming hot-water temperature.
When should I stop and request repair?+
Permanent glass etching will not wash away; do not keep increasing detergent.
Answer for the exact device and software version shown above.