Is this mould? I left my violin inside the case for months and now that I felt like playing it again I found those stains inside it, outside is fine. The fine tuner and the E string were also rusty and it's also giving off a really strong "woody" smell (though I think it always had that smell, I can't remember rn). It's very humid around here during summer which makes me worried. If it's mould does that mean it's unrecoverable? That violin cost me $1000…