O'Rattlecan
Redneck Prognosticator
Heat will not work to loosen them you can not get the heat to the threaded parts. Make sure to use a good quality 6 point socket so not to round them off. If they round you have a whole new learnng experiance ahead.
I always had customers ask me at the hardware store if we sold 6 point sockets, and just wanted to say Randy is right on this one. I found that the Kobalt line offers 6 point sockets so you don't have to run willy-nilly all over creation to find them.
Ryan