How do you remove old digitizer gasket

Replaced battery in an iPad Air. How do you remove old gasket material on digitizer? Alcohol just makes the glue gummy. Can’t scrape with a razor or it scratches the plastic. Goo be gone doesn’t work.

(I successfully used razor to remove glue from iPad case.)

Buy a new digitizer? Don’t think so. At this point I’m ready to chuck Air into garbage and order an iPad Pro.