I carry a small plastic container filled with fresh water with me when I go out, each time I swap lures they go into the fresh water. Then when I get home I simply take them out and leave them to air dry (saves rinsing when you get home plus by that time the reaction to the metal from the salt water may have already started). Just don't leave them in the fresh water too long as they'll start to rust in there too (eventually).
I've found cooking oil spray on the hooks once they've tried helps to ward off rust as well. Might even do the same thing as WD40/Inox etc at a lower cost and no chemical residue/smell either.
Marty