Turn off the power to your Kenmore dishwasher at the kitchen's circuit breaker.
Open the dishwasher door. Remove the six screws from the top control panel, using a Phillips screwdriver.
Detach the wire harness connectors from the terminals by hand. This will dislodge the control panel.
Remove the four T-15 Torx screws that connect the left side of the outer door panel to the frame of the door, using a Torx driver.
Insert a flat-head screwdriver into the slot of the vent screen, then turn the screen counterclockwise.
Lift and remove the vent screen. Inspect the vent screen for any broken parts, and replace the screen if necessary.