Oh for goodness' sake, IDK why I left that question there, sorry. I meant to erase it because I did read your location in the body of your post. I typed it initially before reading the post because I guess I've trained myself to look for the location/zone info by people's names.
We don't always know the right different thing to do when a plant is struggling, but not changing *something* can never help. Good for you for soliciting anecdotes & trying something different. I hope your plant improves!