Trying to change the front pads and I have one out and replaced it with a new one, but when I try and press the two calipers/pistons(whatever) for the other pad it's very difficult(this is my 3rd brake change without this difficulty). One will go all the way in and kinda gets stuck. I opened the bleed valve to try and relieve some pressure but it's still a bitch. Any suggestions/tips besides the obvious? Oh yah, when one goes all the way in it's still difficult the get it back out by pressing the other. Should I oil them, open up the caliper and rebuild with new dust boots etc.? Help guys, I'm driving my girls '86 accord and it's driving me crazy!