Model: CubePro Trio

Hello,
I've had quite a bit of experience with all sorts of 3D printers but recently purchased a Cube Pro Trio and am having the hardest time removing builds from the build plate. Recently, I've been printing lithophanes which are pretty thin panels aboout 40-50 mm tall and removing them from the build plate is near impossible using the provided glue. I've tried soaking the entire plate in water to try to dissolve the glue but that doesn't work with such a large area glued to the plate (approximately 10cm x 10cm). So has anyone found any better ways of removing build? Or get something alternative to the glue to work for ABS builds like masking tape?

Thanks!
-Alex