Guitar Strings?
Playing and jamming difficulties...HELP ME!
It sounds like the tension on the bass string is greater than the tension on the other three strings. Once you remove all four string you should be able to push it back in place with your fingers. If the nut is very loose, you can use a drop of white glue to hold it in place, but don't use too much. You should be able to remove the nut if you need to make adjustments like lowering the action. When you restring the dulcimer, start with the middle strings first and bring them up to proper pitch. That should hold the nut in place while you add the melody and bass strings.
Ken
"The dulcimer sings a sweet song."