Has anyone found a solution for a creaking noise from the air vent at the left end of the dash? Seems to be the right side of the unit rubbing on the opening in the dash, somewhere inside. I've stuffed material in between and used silicone spray but the noise always comes back. A while back, 'wheelchair' mentioned that a new vent was ordered but the thread ended there. Did this solve it? Thanks in advance for any help.