So for the 9 months that I've had my lexus, the sunroom has been working flawlessly, up until today. Everytime I tilt the sunroom, it would make sort of buzzing noise. If I opened it, it would make a buzzing noise at the beginning and would disappear as it opens completely. When closing, it would making the buzzing noise a few inches before closing. Other then that, the sunroom still works fine. I'm just wondering what that noise could be. Any suggestions? Thanks guys.