Detergent tablet or powder remains in the dispenser at the end of the cycle.

Safety first: Turn off power if you will remove internal panels; for basic checks, power can remain on but avoid starting cycles.

Step-by-step checks:

• Loading pattern: Ensure tall plates, pans, or utensils are not blocking the dispenser door from flipping open.
• Clean dispenser: Wipe the dispenser cup and lid with warm water to remove detergent residue that may cause sticking.
• Test door: Manually open and close the dispenser door to confirm it moves freely and latches securely.
• Spray arm coverage: Confirm spray arms are not clogged and can reach the dispenser area.
• Component replacement: If the door does not pop open during a cycle despite clearances, the dispenser assembly may need replacement.

Warning: Do not use liquid dish soap in the dispenser; it will cause excessive suds and may damage the unit.