Do you think it's the switch?
You could try putting a new switch in and inspect it while it's apart.
Swapping switches shouldn't void the warranty as the ROG Spatha X comes with a screwdriver and two switches.
It would be worth trying a new switch, maybe just a fluke with the first one.
If it were me, I might try to identify what is squeaking and gently rub the squeaky part(s) with a lightly oiled cloth.
Or contact ASUS to set up an RMA.