Last year I stuck one of my fire steels in a tackle box I use for boat fishing in case I had to ditch on some islet and needed to make a signal fire (sounds very dramatic). Anyway, some salt water hit the fire steel, probably just a few drops clinging to a fishing hook or lure that I put back in the box, and this is how I found it a few weeks later:
I guess this year I will use a separate, water proof container for that one :-)
Lessons learned