Question about instrument humidifier
The humidifier I use in my case is usually used for guitars. Essentially, it’s a plastic box With small holes and a little sponge sits inside. Whenever I use it, the humidity in my case doesn’t change (I use the hygrometer that comes with my bobelock).
I realized that whenever I wet the sponge I ring it out to the point where it’s only slightly damp. Is this my problem? Should I not be ringing it out?
The need for a case humidifier depends on your ambient climate and the condition inside your home and play venues.
What's the average humidty level where you live?
Sometimes the needles get stuck or don't work in the hygrometer in the bobelock case. Cup your hands around on it and breathe some hot air over it. If it doesn't move, it's not working right.
I use the same kind of humidifier. The dial hygrometers that are put in cases are usually junk. I bought a Calibre IV case hygrometer and I'm real happy with it.
As mentioned already, the hygrometers that come in cases are usually useless. You can purchase a better one fairly inexpensively, and if you want to be extra certain of the accuracy of the hygrometer, David Burgess sells some that he tests himself.
Advice on humidity (why and how to measure and humidify) from luthier David Burgess: