Water remains in the bottom of the dishwasher between cycles, slowly seeping back in after draining.

Safety first: Turn off power before working under the sink.

• Inspect drain hose routing: Ensure the hose rises to a high loop under the countertop before connecting to the sink drain or disposer.
• Install air gap (if required): In some regions, an air gap is required to prevent backflow. Install or clean the air gap as needed.
• Clear sink drain: Make sure the sink drain and disposer are not partially blocked, which can cause water to back up into the dishwasher.
• Re-test: After correcting the hose routing, run a drain cycle and monitor for backflow.