We recommend never to degrease the chain completely. Also when changing to wax, we recommend to degrease the chain only on the outside. If you degrease the chain completely, we recommend to soak the chain in wax for 12–24 hours, so that this can penetrate into the inside of the chain.
From KMC's own website...
We recommend never to degrease the chain completely. Also when changing to wax, we recommend to degrease the chain only on the outside. If you degrease the chain completely, we recommend to soak the chain in wax for 12–24 hours, so that this can penetrate into the inside of the chain.