Ehh I think for the xMagic you can autoclave the assembly one time… if your autoclave has a plastics mode then use that.
There are nuances to autoclaves. The simple ones just fill a chamber with steam for predetermined amount of time at a particular temperature and that’s it. The problem is these simple autoclaves don’t do well with sterilizing the insides of tubes or long cylinders. To properly sterilize those there are autoclaves that effectively use steam and pressure and vacuum and alternate those things a few times in order to try to get the sterilizing action from the hot water molecules into these long tubes and cylinders.
Basically if you’re working with a piercing shop or a decent medical office that routinely sterilizes complex medical instruments (more complex than simple scalpels and forceps) then it should be fine.