Clacking noise when brakes are initally applied in morning

Hi, I have a wierd problem with my 93 euro. Everytime I initally apply the brakes in the morning on my way to work the car makes a clack noise, which I believe is coming from the brakes. I cannot tell if it is front or rear. Once I have applied the brakes the first time, they never make any noise after that. This past weekend I even changed the front brake pads and regreased the sliders, but neither helped. Please let me know if you have any other suggestions.


BTW: When the car makes the noise I do not feel anything abnormal in the brake pedal

This came with a retainer for the pads which over time gets rusty and falls off. Over night the calipers draw back like they should, and then when you hit the brakes for the first time, the pads clack against the rotors. The calipers will not draw back again until it sits overnight again, or for several hours. It is perfectly normal for this car.