I have read (not tried) that a candle lighted and surrounded with damp kindling will gradually dry tinder. Once a bit of tinder is burning use it to dry more and so on. Extreme patience would be required as well as some kind of shelter under which to work.
I like the idea of inner dead twigs on the lower parts of evergreens being dry and flamable. I need to try some of these techniques during next rain. Also, wet fire tinder or esbit fuel can substitute for candle.