Sounds like they are done. Next time you want to remove tires from rims just put them on some foil and put them in the oven. Take them out when the oven reaches 350. Heat is super glues enemy. It breaks down the chemical process that forms the bond. Ive used this method about 10 times now and it works. If you use a lot of glue you may need to heat them more than once. Also the foams don't get ruined this way.