Symptoms
- Detergent cup has a hardened or gummy residue
- Powder detergent clumps before the cycle even starts
- Pods develop a sticky film if left in for a while before running
- Problem worse in humid weather or kitchens
Likely causes
- CommonHumidity entering the dispenser between fillsMoist kitchen air or a damp tub can seep into the cup and start dissolving detergent prematurely.
- CommonDetergent added too far in advance of running the cycleAdding detergent right before you plan to run the dishwasher, rather than hours ahead, prevents this.
- PossibleOld or bulk-stored detergent already partially degradedDetergent stored in a humid pantry or garage can clump even before it reaches the dispenser.
- PossibleDispenser door seal not closing tightlyA worn seal lets more moisture into the cup between cycles.
What to do
- Wipe the dispenser cup completely dry before adding new detergent.
- Add detergent right before starting the cycle rather than loading it hours in advance.
- Store bulk detergent in a sealed, dry container away from humid areas like under the sink.
- Check that the dispenser lid clicks fully shut and isn't warped or cracked, which would let in extra moisture.
- Switch to pods in individually sealed wrappers if powder keeps clumping in your climate.
- If the dispenser cup itself seems to be holding standing moisture between cycles, have a technician check the door seal for a leak.
Tools and parts
- Damp cloth
When to call a pro
This is usually a household humidity or habit issue rather than a repair; a technician is only needed if the dispenser seal itself is confirmed leaking.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.