QUICK FIX as some have reported elsewhere herein:
After easily removing the front cover and then the hinge, use a pin or toothpick to apply the smallest droplet of either super glue or some quick drying glue to each of the rubber strip's inside nibs.
Let dry.
If needed, and also using a pin, touch the smallest amount of glue to the underside of the rubber strip sections that are lose.
Apply some pressure and let the fast-drying super-type glue dry.
This quick-fix fixed my Gem's lose rubber strips almost immediately!
Onward!
IFANAFI
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Same with mine. After three month, the rubber strip is wobbly but still in place.