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If Nade couldn't solve buzzing on the hardware end, she can try approaching it from the software angle.
Picrelated is what i use to almost completely remove noise from my mic. Reaper VST plugin ReaFir. You let it listen to the noise, and it builds up a eq profile of it to substract it from the audio. Google for tutorial for more info on how to use it.
Don't know if it works on kekbook, if not, try googling for similar things.