The serpentine belt starting squeaking on cold and damp mornings about 18 months ago at about 60K. I replaced it with a Dayco belt, and the noise went away for about 6 months. When the weather turned cold last winter, the noise came back. So I changed the tensioner with both idler pulleys right about when the weather warmed up, and it was fine all summer. Now that it has gotten cold again, the squeak is back yet again and as before it goes away when the car warms up. I know it is the serpentine belt because when I spray it with water the noise immediately stops. I checked all the pulleys with the belt off and when I spin them I hear no noise. Is there something else it could be? Thanks.