i removed the front brake pads on my bike to spray "brake quiet" on the backpadding. i accidently removed the caliper bolts and leaked some brake fluid. whata mess. i continue getting to the pad and do what i needed to do. assembled everything together and refill some more brake fluid. i pull the front brake lever and its not grabbing. i look deeply where the pad sits and notice the piston rings (the 2 circles on the caliper) are pushed in creating huge space gaps inbetween the caliper and pad. what can i do to get the brake to work?