This may sound dumb, but I've heard it works. Since many know that Coke (the soda) is so acidic, I've heard of guys dumping the pop around the bead, letting it set a couple hours, and the soda will disolve the crap and goo that is locking the bead up!

 

try removing valve and driving on it. always made bead break on mine. so, did any of these work?