Just a quick question:
After playing the harp do you tap it out ? With the wholes down on your hand or on your leg to get the moisture out?
If not do this everytime you stop playing and let it dry before getting it back in the box.
Also clean it from time to time with an old toothbrush, our saliva dries and gets stuck on the harp if you don’t clean it this could get stuck between the reeds.
Look in the tool shed from Mitch he has a video there on how to clean the harp 😉
Hope this helps let me know 🤔