Back in April when I replaced my rotors and pads I bought the Duralast Ceramic's. Now It just seems like when their cold they make a chirping sound when I get on the brakes hard Almost like a clunk ? And when their hot and going down a steep hill they sound like their chewing the rotor's off. But only if I get on them hard . It did it today coming home from work . I put it on the lift tonight and I can't find anything that would be rubbing . The rotor's look fine . Everything is tight too. ??????? I just don't get it ? I'm about ready to call Autozone and ask for a different type of brake pad . I think their Warranted for a year ? I think ?