Unplug the power cord connected to the Maytag microwave from the wall outlet.
Open the microwave door by pressing down on the front door button, and make sure the door is open all the way.
Locate two 1/2-inch screws on the bottom of the inside screen and two 1/2-inch screws on the top of the screen.
Remove all four 1/2-inch screws from the inside screen using a screwdriver, and the screen will become disengaged.
Lift up screen and pull it out of the microwave so that it goes over the microwave door.
Inspect the inside screen for any damage, such as rips in the trimming, and replace the part if necessary.