Ever need to remove that hot glue gun glue? (polyethylene,..or whatever the stuff is)
Dribble/soak the joint with 99% isopropanol (rubbing alcohol). The best applicator to use is a 2 oz. bottle with a blunt syringe tip.
NO open flames around! OK?!!
Let it sit for ~ 15 seconds (very important), and then tug/ pull away at the glue blob.
It doesn't dissolve the glue itself, but it somehow seems to break the bond between the glue & the surface it's glued to.
I doubt that it would work well on any textiles or porous surfaces, but it works great for metal/plastic/glass smooth surfaces.
A co-worker showed me the trick, I can't take the credit.
Cheers! bart