Move the Spacemaker microwave to a counter top or table so you have easy access to the top of the appliance. Alternatively, stand on a chair in front of the microwave so you can see the top of it.
Locate the two screws on the top of the microwave that hold the grill in place. There is one screw in the front left corner and another in the front right corner.
Remove the screws with a screwdriver and set them aside in a small container.
Pull the grill away from the microwave.
Reverse process to put the grill back in place.