It's not sane to make the switch click and just hope it clicks, I ended up pulling a switch from the plate+pcb by trying to make it click once, not sane
Any external modification make things worse, like lubing etc, when you lube a clicky switch, it never clicks
Some keys probably have warped plastics, therefore they don't click on direct forces, but rather click when you press them sideways (the click is from the separation of the two stem parts, they either like each other so much, or one of them is defective, it might even be the result of the warping of one of the terminals before soldering, most of them have warped terminals, they correct them before soldering)
Long story short, the sanest solution: get 50 blues, replace the switches that you don't like
(This will happen on all keyboards, if you're looking for it / very sensitive)