take the pads out, hold them over a flame(i read somewhere to only use gas cooker-style setups 'cause it's clean burning) use pliers unless your into burnt fingers, leave them for a few minutes and parts of the pad will glow and steam/smoke will come out of the pad when thing like that have stopped put the pad under the cold tap to cool it down, you could probably do the same to your rotor + hit it with some muc off style stuff or muddy water + then drag the brake while going down a hill