Here is a thread I started about this problem. It has links to similar threads from earlier years.
No, it wasn’t a problem with the bearings, it was poor design of the hub itself. KH finally got around to fixing it in about 2015.
KH hubs older than about 2008(?) do not creak, and I don’t think the current ones do either. Their product description says, in two different places, “The Spirit hub is forged from a single piece of CrMo material. This results in a beautifully simple, strong and reliable hub.” Yes, in other words, unlike the one we were selling before!