sticking rear caliper

[RIPN RAY]

so i've been having the driver's rear caliper sticking or dragging lately. i've inspected the e-brake and determined that it's not the e-brake portion. i did notice that the caliper guild bolts are very tight. so tight that i couldn't move them with my fingers. i put some neversieze on them and that seemed to lossen them up for the mean time. but the sticking has returned. i guess my question is; do those bolts and rubber guids go bad by themselves? or is a side effect of a heating up caliper? ...although, when pushing the caliper piston in it didn't give me any trouble. i could even do it slowly with my hand..

any thoughts?

thanks

[632 Regal]

i just replaced all my rubber sleeves this weekend, mine seemed worn loose. under $10 a set at BMA. The rubber hose going to that caliper could be messed up on the inside causing it to stick but if you could push the piston in I doubt it.