Turn off the power supply to the Frigidaire dishwasher at the home's circuit breaker.
Open the dishwasher door all the way and use a screwdriver to remove the mounting screws inside of the door.
Close the door and slide down the outer part of the door to release the mounting clips.
Set the outer panel part of the door aside. Peel off the rubber gasket along the edge of the door.
Place a new gasket in the same position along the door where the old one was.
Place the outer panel back onto the door and open the door.
Re-install the mounting screws and turn the power supply for the dishwasher back on.