About two months ago I bought an Alocasia black velvet for on my desk. My office has a large window and the plant stand at a distance of around 3 meters from the window, so not in direct sunlight. I water it twice a week, letting surplus water drain from the bottom. Recently the plant's leaves are showing brown spots, shown in the picture. I've tried watering the plant less but then the leaves tend to hang a lot lower.
Can anybody tell me what I'm doing wrong?