Remove these two 6mm #2 screws from the two ends of the heating element and carefully withdraw the glass heating element.

The glass heating element is shown in the second picture.

Remove these two 6mm #2 screws attaching the top cover.

Remove this screw attaching the red power cable.

Unplug the pair of yellow wires and unhook them from the hooks tucking them in place.

The top cover can now be removed.