When the brakes are cold first thing in the Morning have a tendency to squeal

My 2004 honda accord 2.4, which has done 82000 miles. When the brakes are cold ie. First thing in the morning have a endency to squeal, after ause and afew miles later the behave well and there is no noise, had it checked by two differant mechanics who have both given the brakes a clean bill of health and there is nothing they can find wrong should I get them replaced any way or is there something else I can do to stop this noise, or not be worried and leave them as the mechanics have said.