so, as a disclaimer, i am the source of the geekhackers krytox kits that are sold by mechanicalkeyboards.com and techkeys.
but i do want to mention that i was of the same opinion as fohat.digs, and that because of this, the one keyboard kits don't include any spring lube. the lube in those kits is definitely meant for either side of the slider's friction points: the sides of the housing where the slider carriages move along, and the front of the slider (linear switches only!) where the slider actuates the crosspoint contact.
HOWEVER, i think i've been convinced that there is change in feeling between unlubed springs and lubed springs. at first i thought that the lube on the springs could only act to dampen them. however, i sampled some of the popular victorinox lube and actually ended up formulating a fluorinated krytox mix that i feel gives the same positives but is superior in longevity and stability, because there is definitely some friction going on there and the lube not only dampens but also smooths out the sliding friction and adds some stiction (static friction; i will go into this in a video at some point) where needed.
i will go into this in a future video or podcast, but the basic idea is that the springs twist on their perches like, well, most springs, and because the springs are the primary opposing force in an mx-compatible switch, rotation at the perches not only can be felt but more importantly, the movement of the coils on the perches makes a subtle low noise that can be heard and may even be interpreted as tactile roughness. another thing that i was just being dumb about is that the stem at the bottom of the slider moves directly inside the bottom chassis stem, and thin lube in there doesn't have the same spring damping effect as thick lube in there.
finally, it's worth nothing that only an absolutely perfect continuously isometric spring compresses without any lateral motion along the length of the spring. this lateral motion turns into friction as the spring hits the chassis' stem housing. again, i think it's mostly sound, but the brain is very good at picking up on these things.
ultimately, it's a subjective thing. you should put lube on the parts of the switch that make it feel better to you.
that said, i must say, i no longer look at switches and say "oh, you definitely don't want lube there".
i'm not sure what the point of this post was. but, i do know that you should use the lube and the lube points that make the most sense to you. i provide krytox because it was extremely popular but very very hard to obtain before i made the jump into distributing it (it costs approximately as much as cocaine, for reference). i had actually never lubed a single board until late last year XD, and it wasn't until i had been vending it for months that i realized how hard it was to mix and dispense and moved to pre-mixed and packaged-in-dispensers kits. anyway, it's certainly been a grand learning experience for me (friction is quite an amazing physical phenomenon (!!)), and one that has taught me that using friction modifiers in moving assemblies is almost always better than not using friction modifiers _as long as the modifier is formulated appropriately to provide a positive benefit_.
