you can try pointing a power head at him for a couple days, that should annoy him enough to make a move. you can also (at your own risk) gently massage a part of the base of the foot until you can get a finger or something (ive heard of ppl using credit cards) under and just keep working it very slowly until he detaches. I dont recommend this because it could take a very long time and if you lose patience and go too fast it will tear the foot and he will likely die..
good luck, keep us posted