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Don't open or lube a hard disk drive!
Opening a hard drive WILL void any warranty your disk drive has, and probably will damage the drive itself. The clearance between the flying heads and the disk surface is measured in micro-inches, and even very small (to you) dust or pollen particles are HUGE by comparison to this head to disk air film. The result of a head colliding with such a huge "rock in the road" is a "head crash", with irreparible damage to the head and possibly damage to the disk surface. You probably will then be forced to spend much more than the cost of a new drive on "data recovery" and the recovery effort to salvage your data might not even be successful. On top of that, you will still need to buy a new disk drive, because the recovery effort does not result in a usable drive, only in salvaged data.