I got a fiddle leaf fern a couple weeks ago, and it was bought with a couple of these dead spots but I think more have appeared. Any reason for this, and any tips for fiddle care? Also I'm not sure if it's a problem, but all but two of the leaves are quite stiff (the ones who aren't were there when I bought it, but they're higher up and therefore newer) EDIT: The dead spots have spread on this leaf and other smaller leaves lower down have completely died, I don't think this is isolated to one leaf- also the other healthy leaves appear to have dropped a bit EDIT2: I had watered it in my shower and given it a good soak, but we as confused because brown spots started appearing from the middle as opposed to the edge- I've check the soil and it's bone dry, so I don't think it has root rot (yet), but I think I overwatered it. Google says it can show signs of both under and over watering and the same time if I water erratically, and that's what I did- opinions? (PSA once I watered it the leaves stopped dropping, now it's just the lowest leaves that are drooping- also it's lost quite a bit of leaves). Also I have no idea what the blue stuff is, it was there when I bought it and hasn't changed or grown
