I’ve a bunch of quiet drives since first released and all are still going strong .... have bought a couple of spare wetsides and a half dozen of the cages. I am having to start replacing the MP60 wetsides, but none of the MP40s yet. I have spare cages so I can mechanically clean the base and magnet assembly with a toothbrush and screw on a clean cage and back in it goes. Fouled cage goes into vinegar as there’s nothing to damage and it becomes the clean cage for the next cleaning interval. Recently retired my last pre-QD vintage 40 .... rubber grommets had all split and it was just too noisy.