How do I get the rest of this glue off the LCD?

So I was able to seperate the glass from the LCD screen on my galaxy S4. Plop in the motherboard, and it works great, sans glass!

There is, however, a problem. There seems to be a layer of glue stuck to the screen. In fact, only one small spot of the screen is actually clean LCD panel; it turn out that the vast majority of the screen has a sticky feel, so the glue must still be on the screen.

In the youtube videos, people talk about "rub it off with your finger" but I do NOT want to press hard enough on my LCD screen to rub the glue off as it use. Using isopropyl alchohol does absolutely nothing to this ex-loca glue.

Could someone please suggest a different technique or solvent? Thanks.

Hope you can see this.