Nope, I never had any trouble with my 1964 Gibson J45. When I first got it (used in the mid 70's), I had a cheapo little humidifier, which was a clump of claylike stuff in a plastic container with holes poked in the top of the thing. You were supposed to soak the clay thingie in water & put in in the container inside your case & it would maintain the perfect humidity. Or in the summr when it's humid, one supposedly put it in the case dry to soak up the humidity in the summer. (or whenever) I used it for a few months, then I decided it was unnecessary.