I had been keeping blades in two or three of my razors at once, switching razors each day, but I started wondering if having a dampish blade in the open air that might not get used again for a couple of days was such a smart thing to do. I know they're generally stainless, but might there be a bit of deterioration to the edge from keeping a blade out in open air in a moist environment for longer than if I just used one blade at a time?