Belts squeak in the morning, especially if it is cold. Any suggestions? Thought it could be from dust or mud getting caught in it or the pulley system being off center causing it squeal. Testing it by putting the AC on makes that AC belt squeal, putting lights on makes the alternator belt squeal. Belts have long striations as grips whereas maybe it is better to get new belts with knob end grip rather than lines? All pulley bearings were checked and were ok.