Originally Posted by P057

you can try this:

get some wd40 and lightly spray down a q-tip, grease up the walls of where the recessed screw is located. Try as best as possible to not get wd40 on the actual screw at all.
Get whatever allen key fits the best (or fit at one time) for the screw. Get a heat gun, let it get to optimal heating, and then quickly squeeze a decent size blob on the end of the allen key.
Put the key in, pushing down hard and into place the allen key into the screw, let it harden. Then while pushing down hard and slowly, turn it loose. You might need to try again with even more glue if the first time it breaks.

That's about the only idea I can give, sorry.