Was driving slowly through a animal safari, when brakes were pressed I would hear a creaking sound, not a squeaking. Sounded like was coming from caliper area. Perhaps some debris got in there? Pads were at 4mm on last inspection and was told I should be good until fall. The creaking sound lasted through the drive of the safari. But once parked for the day was fine on drive home and have not heard since. Is this something I should have inspected? I'm a little anal about seizing my calipers having my wife just done this on her car and having to front that bill $$$.