How Many Dulcimers Do You Own?
General mountain dulcimer or music discussions
I have to admit that I'm the opposite: I love changing strings. New strings look, feel, and sound better than old ones. On the dulcimer and guitar I use regularly, I change strings about every 3 months. The other ones might go a year without new strings, but once I pick one up to play and realize how dull-sounding and stiff-feeling they are, I put new strings on right away. Sometimes I have a little string-changing party and change strings on several instruments at once.
Make sure you have the right equipment: a string winder, a wire cutter, a capo, a tuner. (If you have one of those scroll heads with the closed back, you might also need some needle-nose plyers.) It takes 5 minutes to change 3 strings, and then for several months you get to enjoy the bright tone and soft feeling of the new strings.
Strings last longer if you keep your instruments in cases. If you hang them on the wall or on stands, as I tend to do, the oxidization process speeds up.

I'm normally pretty cheap about strings and only change them once in a while, not 'regularly'. The only strings I actually notice that 'die' over time are wound strings. The great Margaret Barry once said that in hard times she stripped wire from window screens to string her banjo with.