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

Safety first: Disconnect power before working behind the dishwasher or under the sink.

Steps:

• Check hose routing: Ensure the drain hose rises to a high loop under the countertop before connecting to the sink trap or disposer.
• Install air gap (if required): In some regions, an air gap fitting on the sink is required to prevent backflow.
• Clean sink trap: Remove and clean the sink trap to prevent water backing up into the dishwasher.

When to call a technician: If you are unsure about plumbing modifications, consult a plumber or appliance installer.