Glass is a hard, amorphous solid. To "repair" a scratch, you cannot simply wipe it away; you must physically polish the glass surrounding the scratch down to the level of the scratch. This requires an abrasive.
Hard drives are assembled in Class 100 cleanrooms (less than 100 particles larger than 0.5 microns per cubic foot). Windex and WD-40 introduce oils, surfactants, ammonia, and propellants. These substances: windex wd repair
In older drives (think Quantum Bigfoot, early Maxtor, and some IBM Deskstars), the read/write heads would land directly on the platter surface when powered off. Over time, due to humidity, degraded lubricant, or smooth platter finishes, the heads would to the platter like a suction cup. When you powered on the drive, the spindle motor couldn't overcome the friction. Glass is a hard, amorphous solid
If you have found yourself typing "Windex WD repair" into a search engine, you are likely standing in a room with a broken window, a squeaky hinge, or a clouded pane of glass, holding a bottle of blue cleaner and wondering if it is the solution to your problem. Hard drives are assembled in Class 100 cleanrooms