I keep my them in a cabinet with a tub of DampRid. Works well for me. I also coat with jojoba oil before putting away.
I only use wd40 after on the blades after I’m done with my water stones.
I live in a pretty humid environment and I’ve never had much luck with wax.
There are other products like BoeShield I seem to only use it on my machines but I think it would work on hand tools.