Heat gun as suggested, but not to heat the tape...
What you need to do, is soften the plastic, grab it with a pair of bull nose pliers (or multi grips) and squeeze the edges in until you can get a decent grip on it.
Use a twist motion to get it off, not a side to side one, else you will most likely break the screen. Then clean up the glue with a razor blade.
In the workshop, we grind em off with a roloc disc.
Jas
