A basic rule of thumb is "if you are comfortable, your instrument will be comfortable." I find that my mountain dulcimers are not as sensitive to humidity as my guitars and banjos. I keep the latter in their cases to help maintain humidity. I also use humidifiers in the cases. Only once have I found the need to humidify my mountain dulcimers which was during a particularly cold winter here in Pennsylvania. I notices the fret ends stick out from the fret board. I stuck a wet sponge in soap dish in which I drilled a few holes in dulcimer's case. That solved the problem. What Ken said about the strings.
Ken
"The dulcimer sings a sweet song."
