Hi!! I just got this lemon button fern 2 months ago, and it was in great condition when I got it, but starting to decline 😔 I have been following the store owner's instructions (mist it often, water about once a week) but it is starting to brown which I typically see in underwatered plants, but I am pretty consistent with this one. Let me know if you have any advice or tips I would greatly appreciate it ❤️❤️❤️ (hopefully the photo adequately shows the brown/wilting area in the middle and bottom)