I contacted Eureka! regarding the glue problem back when I got it over a year ago, and they suggested the following:
"Sorry for the delayed reply. There was a problem at our manufacturer's, where the wrong glue was used on this particular title. We apologize for the problem here (especially on such an important release) -- I'd suggest using some kind of product which gets rid of adhesives; in the U.S. we have something called "Goo Gone" which does the trick without damaging the product, and is citrus-based. Maybe this will help? Again, our apologies for this snafu on the release..."
I didn't have this problem with the other Eureka! steelbooks. I thought to would be good to contact them before trying anything insanely stupid.