Should always carry some dry tinder as part of your fire kit. I keep some stashed away in most of my pouches and packs, and even on the corkscrew of my Swiss Army knives. Just a plain ferro rod is good enough, the blastmatch seems overly complicated. We were hiking in the Catskills during the rain that caused the 2006 floods, we made the last stream crossing just in time, set up our group tarp, and proceeded to light a fire in one try after the area had received 6"-9" of rain in 24 hours. No matter how wet it seems, there's always enough dry (enough) stuff to get a fire going to the point where it will either burn the damp stuff, or dry it out before burning. At least you made the discovery in fairly safe conditions, lesson learned.