Yes, dishwasher spray arms can wear out over extended periods of use. While the rigid plastic body of the spray arm is durable, the central plastic bearings, mounting threads, retaining nuts, and snap-in locking clips experience continuous mechanical friction, water pressure stress, and thermal degradation from hot wash cycles. Over years of operation, these plastic components can warp, crack, or lose their structural integrity, causing the spray arm to wobble, leak water pressure, or detach completely during a wash cycle, necessitating a replacement spray arm assembly or retaining clip.
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