It’s always fun to void warranties and crack open your drive to clean it yourself! *
[*: disclaimer: I am not responsible for you opening your drive to clean it, killing it outright, and voiding your warranty in the process. Nor will I be responsible for anyone who tries to return their drive for an RMA after killing it in said process, when they were still in warranty–and don’t condone this. But I DO [I]FULLY[/I] condone you trying to open an out-of-warranty drive, since you have nothing to lose…]
Maybe a cleaning can do it. It’s worth a shot.