My 04 made that exact same noise. I sprayed dressing on, it went away for a couple of hours then got much worse for a day or two. Then one day the noise disappeared and has not returned. this was almost 3 months ago. You can try crawling underneath, remove the plastic belly shroud and take a wire brush to the inside of the belt while its turning. This cleans up some of the glazing and will most likely solve your problem. If this fails, install a new belt.
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