I should add that I use my own technique:

1. dulcie on a table, held in place with plasti-tak (Bluetack). This holds it firm and makes it louder.

2. thumb pick (rather than flat pick) plucks the melody string

3. right-hand fingers are free to fingerpick accompaniments

I can strum all three strings if I want, but I don't, usually.

It is important not to yank the instrument off the plasti-tak. Rather, loosen the plasti-tak from the table with your fingertips, then peel it off the dulcimer. Why bother? The seal can be so strong that the plasti-tak starts taking the bottom off your dulcimer.