I use Zero Odor (blue and white bottle), available on Amazon. It gets rid of the odor and breaks down the urine. Works like a charm around the house for cat urine, much better than Nature's Miracle, which does nothing. Well it does something . . . it is enormously profitable to make and sell. Masterful marketing. What Zero will do to a paper cone driver . . .? No idea, but a light touch might be a good place to start.
More important, did you notice any improvement in the soundstage? Was the speaker more resolving?