My driver side caliper keeps sticking. I have changed it 2 times, the driver side roader i have change 2 times also.break pads 2 times. I don’t know what could be happening? I don’t think i would get 2 bad calipers, I have been buying them at Auto Zone, It has a lifetime warranties, the roader warrantie is over, break pads are lifetime also. Where do i start to look? what could it be break line but which one, and where is it? hope someone can HELP