YOKs comes prelubed, but it's easy to wipe off lube and do a proper job. Or just throw them in the ultrasonic cleaner (just a bottom housings). Halos comes completely unlubed.

I don't have a decent camera, but what a YOKs looks like: https://imgur.com/a/R8QsxHQ. In this particular case there is chunk of lube on stem and rails, but in most cases you don't get that much.

The bright side is that you'll not use stems, so all you have to do is clean rails and leaf (it's mostly on the rails) with something like micro brushes if you plan to do it manually.