>
>> I popped their keycaps and smelled the corresponding MX keyswitches >> underneath.
>> It's like kerosene or WD40, I could not tell.
>>
>> So, could those mysterious liquid be cleaned without replacing the
>> corresponding keyswitches?
>
> I would personally try 99% isopropyl alcohol. It is cheap and likely easy
> for you to find, and likely will take most of the oils off the keyboard.
> It shouldn't take long to fully evaporate either, probably real quick if
> you put it out in the sun.
>
> Best of luck.
To submerge the whole TKL keyboard? That takes a big bucket and a lot of "99% isopropyl alcohol"!! And it's dangerous because "99% isopropyl alcohol" could caught fire.
Let me think about it. It's a high-risk op!!!