Hello Craig, and all the other techs that google "the best way to remove iPad glue"
I have repaired hundreds of iPad screens, from 1st to Air and so far my glue removal method is:
Remove all glass and tape..
Use a metal spudger looks like a dentist pick with a flat head on both sides. I shape one end to fit the small groove for the bezel. (the key is to keep the blade sharp and flat) So sharpen once every other frame. use a flat bladed Dremel or metal emery cloth to keep a flat or straight sharp edge on it. I dip the tip into ISO and scrap around the frame. wiping off the blade using a paper towel as it gathers glue. you'll find a sweet spot with the amount of ISO needed. JUST after 6 inches of scraping I dampen a Q-tip with ISO and wipe up the loosened glue. Then the next 6 inches. When the bulk of the glue has been scraped and wiped up with a Q-tip and ISO I use goof off and a Q-tip to remove any thin layer of glue left over. But again I only clean up about 6 inches of frame with the goof off then use a Q-tip with ISO to rinse. The whole frame cleaning process may take 10 minutes depending on if its been repaired before, or the model iPad, some models seem easier then others. Hope the info helps.