storing an instrument
Instruments- discuss specific features, luthiers, instrument problems & questions
The advice to loosen the strings is common for guitars. But string tension on guitars is much greater than that on dulcimers, and dulcimers have the ultimate brace (meaning the fretboard) keeping things intact. Tuning down a little bit, as John and Nate have suggested, is probably a good idea but may not be necessary unless environmental conditions are going to change drastically. If the instrument is just going to sit in your closet, I wouldn't worry about it. If you are putting it in a storage unit in the desert with no climate control, you may run into problems that loosening the strings won't solve.
P.S. Congrats on your McCafferty dulcimer. I love mine, which is evidenced in how "used" it now looks.
updated by @dusty: 05/14/25 02:03:55PM