How do you properly clean an old keyboards keycaps?

[NJM1112]

So i recently found an OmniKey101 with white alps and i want to use it. It's old but not heavily used. It's got some age marks and some dark spots. How do i properly clean the the keycaps?

 

I've seen methods of soaking them in hot water & soap and even vinegar solutions. But i'm unsure what the right way to go about this is. I don't want to accidentally ruin an antique.

[CoolBeans]

Hold on, let me search r/mechanical keyboards for you.

[CoolBeans]

Here is a rough guide http://m.imgur.com/a/Xlp8v

[JupiteL]

Try isopropyl alcohol? or just wash it with water will do. I've already tried that with my father's old keyboard.

[NJM1112]

I've got about half a bottle of 70% isopropyl on hand.

 

Would you recommend i do a Large (diluted) batch for a long time? I mean I'm not in a hurry.

[Wferr]

Here is a rough guide http://m.imgur.com/a/Xlp8v

and i though you were jokeing about the /r/mechanical keyboard.. The internet is amazing

[The Syndicate]

Here is a rough guide http://m.imgur.com/a/Xlp8v

I was kind of mind blown by this.

[Wferr]

I was kind of mind blown by this.

same..

[NJM1112]

I ended up putting them in a hot water bath with some soap for about 10mins. I poured out the water and scrubbed&dried them with a dry wash cloth. They weren't that dirty surprisingly. They're drying on my 2nd desk now.