WD40 is absolutely a lubricant (water is a lubricant even), but a poor one
And when the WD40 you sprayed dries out, and it will, all that is left are sharp little crystals, and these are the source of future squeaking.
And when the WD40 you sprayed dries out, and it will, all that is left are sharp little crystals, and these are the source of future squeaking.