The oven door gasket is held in place with clips and can be removed by gently pulling the gasket away from the inner door panel.
Begin by pulling the gasket out of the hole at the bottom of the inner door liner.
Grasp the oven gasket clips with needle nose pliers and gently pull each clip away from the inner door.
To replace the gasket start at the bottom of the liner and tuck one end of the oven door gasket into the opening in the inner door panel and work around the liner insertion the clips.
When complete tuck the end of the gasket into the opening.
Here is a link to your range model sce30600. | 
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