cayman S ( 8000 miles) unbearable brake squeaks . took it to the dealer , cleaned my pads and discs ( charged me ofcourse ) . but the squeaks wont go away. they are becomming embaressing . is it possible that the heat shields are touching the discs? cuz they only squeak when the brakes are hot . can they physically be touching when the heat sheild expands and touches the disc ? or they cant physically be touching ?