Noisy window seals

I've lived with this problem for years on my '04 325Xi, and I've had enough and want to address it. The windows on this car, when in the up/closed position are noisily as heck when going over bumps or deflections, and it really makes the car sound cheap to me and my passengers. Lowering them just a little removes the squeak/rattle, but of course adds noise and isn't practical. I do have them professionally tinted with film, so I have no idea if that has anything to do with it. Any ideas? Anyone experienced this? My search yielded nothing. The seals appear in good shape, and I have no leaks.





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